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Littérature scientifique sur le sujet « Electrical Transport Phenomena »

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Publié le 7 septembre 2023

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Articles de revues sur le sujet "Electrical Transport Phenomena"

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Liu, Po-Tsun, T. C. Chang, Shuo-Ting Yan, Chun-Huai Li et S. M. Sze. « Electrical Transport Phenomena in Aromatic Hydrocarbon Polymer ». Journal of The Electrochemical Society 150, no 2 (2003) : F7. http://dx.doi.org/10.1149/1.1535204.

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Wei, P. S., S. C. Wang et M. S. Lin. « Transport Phenomena During Resistance Spot Welding ». Journal of Heat Transfer 118, no 3 (1 août 1996) : 762–73. http://dx.doi.org/10.1115/1.2822697.

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Unsteady, axisymmetric transport of mass, momentum, energy, species, and magnetic field intensity with a mushy-zone phase change in workpieces and temperature, and magnetic fields in electrodes during resistance spot welding, are systematically investigated. Electromagnetic force, joule heat, heat generation at the electrode–workpiece interface and faying surface between workpieces, different properties between phases, and geometries of electrodes are taken into account. The computed results show consistencies with observed nugget growth, electrical current, and temperature fields. The effects of the face radius and cone angle of the electrode, parameters governing welding current, electrical contact resistance, magnetic Prandtl number, electrical conductivity ratio, and workpiece thickness on transport phenomena are clearly provided.
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Vásquez-A., M. A., G. Romero-Paredes et Ramón Peña-Sierra. « Electrical transport phenomena in nanostructured porous-silicon films ». Revista Mexicana de Física 64, no 6 (31 octobre 2018) : 559. http://dx.doi.org/10.31349/revmexfis.64.559.

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The charge transport mechanisms in nanostructured porous silicon (PS) films were studied through current-voltage (I-V) measurements of planar Au/PS/Au structures at 300 K. The films were formed by electrochemical etching of 1-5 Ω-cm p-type Si (100) wafers producing PS layers of 4.48 x 109 Ω-cm. The charge transport is limited both by the space charge limited currents (SCLC) and the carrier trapping-detrapping kinetics in the inherent localized PS energy levels. I-V characteristics evolve according to the trapping-detrapping carrier kinetics in the PS films showing that the electrical current can be controlled by applying external electric fields. An equivalent trap filling limiting voltage (VTFL) was identified that shifts between 1 and 3 volts by the carrier trapping-detrapping kinetics from the PS intrinsic defect states. An energy band diagram for the PS films is schematically depicted including the influence of the intrinsic PS defect states. To give a reasonable explanation of the found behavior the existence of a thin silicon oxide film covering the network-like-silicon-nanocrystallites is required, in agreement with the widely accepted PS structural models.
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Balberg, Isaac. « Electrical Transport Phenomena in Systems of Semiconductor Quantum Dots ». Journal of Nanoscience and Nanotechnology 8, no 2 (1 février 2008) : 745–58. http://dx.doi.org/10.1166/jnn.2008.a010.

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While a fairly good understanding of optical and transport properties that are associated with single quantum dots has emerged in recent years the understanding of the relation between these properties and the observed macroscopic optical and electrical properties of solid ensembles of such dots is still at a very rudimentary level. This is in particular so in regard to the transport properties where the interplay between inter-dot conduction and the connectivity of the dots network determines the macroscopic observations. Reviewing the basic concepts and issues associated with these two essential ingredients, and considering some recent experimental observations on quantum dot ensembles of CdSe and Si, an effort is made here to derive a whole-but-simple physical basis for the understanding of the transport and the optoelectronic properties of solid state ensemble of semiconductor quantum dots.
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Takita, H., S. Murayama, K. Hoshi, X. Li, F. R. de Boer et Y. Obi. « Electrical transport phenomena in amorphous (Hf, Ta) Fe2 alloys ». Journal of Magnetism and Magnetic Materials 140-144 (février 1995) : 307–8. http://dx.doi.org/10.1016/0304-8853(94)00895-7.

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Konczewicz, Leszek, Elżbieta Litwin-Staszewska, Sylvie Contreras, Ryszard Piotrzkowski et Lesław Dmowski. « Electrical transport phenomena in magnesium-doped p-type GaN ». physica status solidi (b) 246, no 3 (19 décembre 2008) : 658–63. http://dx.doi.org/10.1002/pssb.200880521.

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Grigoriev, N. D. « «WIRES WITH HIGH VOLTAGE TRANSPORT CURRENT» ». World of Transport and Transportation 15, no 2 (28 avril 2017) : 244–50. http://dx.doi.org/10.30932/1992-3252-2017-15-2-23.

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[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT Dmitry A. Lachinov was born 175 years ago and nothing foreshadowed that a man appeared who would explain the theory of transmission (transportation) of electricity over long-distance via wires and without large losses, using high-voltage currents (over 1000 V), power transformers and a three-phase alternating current system. That was Dmitry Lachinov who introduced mathematical methods into electrical engineering, making it possible to create electric machines not on the basis of empiricism, but due to mathematical evaluation of physical phenomena. Keywords: history, electrical engineering, Lachinov, electricity transmission via wires, electric machines, generators, engines, batteries for submarine fleet.
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Vasvári, Béla. « Transport phenomena in metallic glasses ». Physica B : Condensed Matter 159, no 1 (juillet 1989) : 79–91. http://dx.doi.org/10.1016/s0921-4526(89)80056-0.

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Naumowicz, Monika. « Electrical Properties of Model Lipid Membranes ». Membranes 12, no 2 (21 février 2022) : 248. http://dx.doi.org/10.3390/membranes12020248.

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Biological membranes are essential components of the living systems, and processes occurring with their participation are related mainly to electric phenomena such as signal transduction, existence of membrane potentials, and transport through the membrane [...]
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Suchanicz, J., K. Kluczewska-Chmielarz, D. Sitko et G. Jagło. « Electrical transport in lead-free Na0.5Bi0.5TiO3 ceramics ». Journal of Advanced Ceramics 10, no 1 (18 janvier 2021) : 152–65. http://dx.doi.org/10.1007/s40145-020-0430-5.

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AbstractLead-free Na0.5Bi0.5TiO3 (NBT) ceramics were prepared via a conventional oxide-mixed sintering route and their electrical transport properties were investigated. Direct current (DC, σDC) and alternating current (AC, σAC) electrical conductivity values, polarization current (first measurements) and depolarization current, current–voltage (I–U) characteristics (first measurements), and the Seebeck coefficient (α) were determined under various conditions. The mechanism of depolarization and the electrical conductivity phenomena observed for the investigated samples were found to be typical. For low voltages, the I–U characteristics were in good agreement with Ohm’s law; for higher voltages, the observed dependences were I–U2, I–U4, and then I–U6. The low-frequency σAC followed the formula σAC–ωs (ω is the angular frequency and s is the frequency exponent). The exponent s was equal to 0.18–0.77 and 0.73–0.99 in the low- and high-frequency regions, respectively, and decreased with temperature increasing. It was shown that conduction mechanisms involved the hopping of charge carriers at low temperatures, small polarons at intermediate temperatures, and oxygen vacancies at high temperatures. Based on AC conductivity data, the density of states at the Fermi-level, and the minimum hopping length were estimated. Electrical conduction was found to undergo p–n–p transitions with increasing temperature. These transitions occurred at depolarization temperature Td, 280 ℃, and temperature of the maximum of electric permittivity Tm is as typical of NBT materials.
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Thèses sur le sujet "Electrical Transport Phenomena"

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Rana, Dhan B. « Electrical transport and photo-induced phenomena in Ga2O3 single crystal ». Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1529409880030348.

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Poehler, Scott A. « Transport Phenomena of CVD Few-Layer MoS2 As-grown on an Al2O3 Substrate ». The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1440181154.

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Dou, Ziwei. « Investigation on high-mobility graphene hexagon boron nitride heterostructure nano-devices using low temperature scanning probe microscopy ». Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/283618.

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This thesis presents several experiments, generally aiming at visualising the ballistic and topological transport on the high-mobility graphene/boron nitride heterostructure using the scanning gate microscope. For the first experiment, we use the scanning gate microscopy to map out the trajectories of ballistic carriers in high-mobility graphene encapsulated by hexagonal boron nitride and in a weak perpendicular magnetic field. We employ a magnetic focusing transport configuration to image carriers that emerge ballistically from an injector, follow a cyclotron path due to the Lorentz force from an applied magnetic field, and land on an adjacent collector probe. The local potential generated by the scanning tip in the vicinity of the carriers deflects their trajectories, modifying the proportion of carriers focused into the collector. By measuring the voltage at the collector while scanning the tip, we are able to obtain images with arcs that are consistent with the expected cyclotron motion. We also demonstrate that the tip can be used to redirect misaligned carriers back to the collector. For the second experiment, we investigate the graphene van der Waals structures formed by aligning monolayer graphene with insulating layers of hexagonal boron nitride which exhibit a moiré superlattice that is expected to break sublattice symmetry. However, despite an energy gap of several tens of millielectronvolts opening in the Dirac spectrum, electrical resistivity remains lower than expected at low temperature and varies between devices. While subgap states are likely to play a role in this behaviour, their precise nature is still unclear in the community. We therefore perform a scanning gate microscopy study of graphene moiré superlattice devices with comparable activation energy but with different charge disorder levels. In the device with higher charge impurity ($\sim$ 10$^-$ cm$^{-2}$) and lower resistivity ($\sim$ 10 k$\Omega$) at the Dirac point we observe scanning gate response along the graphene edges. Combined with simulations, our measurements suggest that enhanced edge doping is responsible for this effect. In addition, a device with low charge impurity ($\sim$ 10$^{9}$ cm$^{-2}$) and higher resistivity ($\sim$ 100 k$\Omega$) shows subgap states in the bulk. Our measurements provide alternative model to the prevailing theory in the literature in which the topological bandstructures of the graphene moiré superlattices entail an edge currents shunting the insulating bulk. In the third experiment, we continue our study in the graphene moir$\acute e$ superlattices with the newly reported non-local Hall signals at the main Dirac point. It has been associated with the non-zero valley Berry curvature due to the gap opening and the nonlocal signal has been interpreted as the signature of the topological valley Hall effects. However, the nature of such signal is still disputed in the community, due to the vanishing density of states near the Dirac point and the possible topological edge transport in the system. Various artificial contribution without a topological origin of the measurement scheme has also been suggested. In connection to the second experiment, we use the scanning gate microscope to image the non-local Hall resistance as well as the local resistance in the current path. By analysing the features in the two sets of images, we find evidence for topological Hall current in the bulk despite a large artificial components which cannot be distinguished in global transport measurement. In the last experiment, we show the development of a radio-frequency scanning impedance microscopy compatible with the existing scanning gate microscopy and the dilution refrigerator. We detailed the design and the implementation of the radio-frequency reflectometry and the specialised tip holder for the integration of the tip and the transmission lines. We demonstrate the capability of imaging local impedance of the sample by detecting the mechanical oscillation of the tip, the device topography, and the Landau levels in the quantum Hall regime at liquid helium temperature and milli-Kelvin temperature.
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郭榮忠 et Wing-chung Kwok. « Current conserving AC quantum transport in two-dimensional mesoscopic systems ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B3122104X.

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Kwok, Wing-chung. « Current conserving AC quantum transport in two-dimensional mesoscopic systems / ». Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20668065.

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Sirisathitkul, C. « Studies of transport phenomena at ferromagnet/semiconductor interfaces ». Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325445.

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Collin, Philippe. « Design, taking into account the partial discharges phenomena, of the electrical insulation system (EIS) of high power electrical motors for hybrid electric propulsion of future regional aircrafts ». Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30116.

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La réduction des émissions de CO2 est un enjeu majeur pour l'Europe dans les années à venir. Les transports sont aujourd'hui à l'origine de 24% des émissions globales de CO2. L'aviation ne représente que 2% des émissions globales de CO2. Cependant, le trafic aérien est en pleine expansion et, déjà, des inquiétudes apparaissent. A titre d'exemple, en Suède, depuis les années 1990, les émissions de CO2 dues au trafic aérien ont augmenté de 61%. Ce constat explique l'apparition du mouvement "Flygskam" qui se repend dans de plus en plus de pays Européen. C'est dans ce contexte que l'Union Européenne a lancé en septembre 2016 le projet Hybrid Aircraft Academic research on Thermal and Electrical Components and Systems (HASTECS). Le consortium regroupe différents laboratoires et Airbus. Ce projet s'inscrit dans le programme "Clean Sky 2" qui vise à développer une aviation plus verte. L'objectif ambitieux est de réduire de 20% les émissions de CO2 et le bruit produits par les avions d'ici 2025. Pour cela, le consortium étudie une architecture hybride de type série. La propulsion est assurée par des moteurs électriques. Deux cibles ont été définies. En 2025, les moteurs doivent atteindre une densité de puissance de 5kW/kg, système de refroidissement inclus. En 2035, la densité de puissance des moteurs sera doublée pour atteindre 10kW/kg. Pour atteindre ces cibles, le niveau de tension sera considérablement augmenté, au-delà du kilovolt. Le risque de décharges électriques dans les stators des moteurs électriques est considérablement accru. L'objectif de cette thèse est de mettre au point un outil d'aide au design du Système d'Isolation Electrique (SIE) primaire du stator de moteur électrique piloté par convertisseur. Elle est découpée en cinq parties. La première partie commence par préciser les enjeux et défis d'une aviation plus verte. Le SIE du stator de moteur électrique est développé. Enfin, les contraintes qui s'appliquent sur le SIE dans l'environnement aéronautique sont identifiées. La deuxième partie présente les différents types de décharges électriques que l'on peut retrouver. Le principal risque vient des Décharges Partielles (DP) qui détériorent peu à peu le SIE. Le principal mécanisme pour expliquer l'apparition des DP est l'avalanche électronique. Le critère de Paschen permet d'évaluer le Seuil d'Apparition des Décharges Partielles (SADP). Différentes techniques permettent de détecter et mesurer l'activité des DP. Des modèles numériques permettent d'évaluer le SADP. La troisième partie présente une méthode originale pour déterminer les lignes de champ électrique dans un problème électrostatique. Elle n'utilise qu'une formulation en potentiel scalaire. La quatrième partie présente une étude expérimentale pour établir une correction du critère de Paschen. Un bobinage de moteur électrique est très loin des hypothèses dans lesquelles ce critère a été originellement défini. Enfin, la cinquième partie est consacrée à l'élaboration de l'outil d'aide au design du SIE. Des abaques sont construites afin de fournir des recommandations sur le dimensionnement des différents isolants dans une encoche de stator. Une réduction du SADP due à une variation combinée de la température et de la pression est prise en compte
Reducing CO2 emissions is a major challenge for Europe in the years to come. Nowadays, transport is the source of 24% of global CO2 emissions. Aviation accounts for only 2% of global CO2 emissions. However, air traffic is booming and concerns are emerging. For instance, CO2 emissions from air traffic have increased by 61% in Sweden since the 1990s. This explains the emergence of the "Flygskam" movement which is spreading in more and more European countries. It is in this context that the European Union launched in September 2016 the project Hybrid Aircraft Academic research on Thermal and Electrical Components and Systems (HASTECS). The consortium brings together different laboratories and Airbus. This project is part of the program "Clean Sky 2" which aims to develop a greener aviation. The ambitious goal is to reduce CO2 emissions and the noise produced by aircraft by 20% by 2025. To do that, the consortium is studying a serial hybrid architecture. Propulsion is provided by electric motors. Two targets are defined. In 2025, the engines must reach a power density of 5kW/kg, including the cooling system. In 2035, the power density of the engines will be doubled to reach 10kW/kg. To reach these targets, the voltage level will be considerably increased, beyond one kilovolt. The risk of electric discharges in the stators of electric motors is considerably increased. The objective of this thesis is to develop a tool to assist in the design of the primary Electrical Insulation System (EIS) of the stator of an electric motor controlled by a converter. It is organized in 5 parts. The first part begins by clarifying the issues and challenges of a greener aviation. The electric motor stator EIS is developed. Finally, the constraints that apply to the EIS in the aeronautical environment are identified. The second part presents the different types of electric discharges that can be found. The main risk comes from Partial Discharges (PD) which gradually deteriorate the EIS. The main mechanism for explaining the appearance of PD is the electronic avalanche. The Paschen criterion makes it possible to evaluate the Partial Discharge Inception Voltage (PDIV). Different techniques are used to detect and measure the activity of PD. Numerical models are used to evaluate the PDIV. The third part presents an original method for determining the electric field lines in an electrostatic problem. It only uses a scalar potential formulation. The fourth part presents an experimental study to establish a correction of the Paschen criterion. An electric motor winding is very far from the hypotheses in which this criterion was originally defined. Finally, the fifth part is devoted to the development of the SIE design aid tool. Graphs are generated to provide recommendations on the sizing of the various insulators in a stator slot. A reduction in the PDIV due to a combined variation in temperature and pressure is taken into account
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Giroud, Franck. « Elaboration et études des propriétés de transport de couches minces quasicristallines AlCuFe ». Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10251.

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Ce travail est consacre a l'elaboration, la caracterisation structurale et microstructurale, ainsi qu'a l'etude de la conductivite electrique de couches minces de l'alliage quasicristallin alcufe. Les echantillons ont ete fabriques par evaporation sequentielle des elements constitutifs de l'alliage, puis traitement thermique. Nous avons etudie les chemins reactionnels conduisant a la phase quasicristalline par diffraction des rayons x lors du traitement thermique de tricouches metalliques. La phase quasicristalline peut etre obtenue quelle que soit la sequence d'empilement du tricouche. Nous montrons que la premiere phase qui cristallise est al#2cu y compris lorsque la couche de fer est placee entre celles de al et cu. Dans ce cas on observe la formation d'alliages binaires al, cu de part et d'autre de la couche de fe, indiquant une diffusion croisee des deux elements al et cu a travers celle-ci. A plus haute temperature le fer participe aux reactions, s'alliant d'abord avec l'aluminium, avant que des phases ternaires n'apparaissent, qui conduisent ensuite au quasicristal. Nous nous sommes ensuite concentre sur l'elaboration de couches tres minces (jusqu'a 125 angstroms). Nous avons pu fabriquer des couches quasicristallines tres minces compactes et d'epaisseur homogene. Ainsi nous avons pu etudier la conductivite electrique des echantillons en fonction de leur epaisseur. A basse temperature, les dependances en temperature et en champ magnetique de la conductivite font apparaitre une transition vers un regime bidimensionnel, qui est une signature de la presence d'effets d'interferences quantiques. Cette etude confirme leur importance dans la conductivite des quasicristaux, et permet de preciser les valeurs des parametres microscopiques qui la regissent.
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JOHNSON, JAMES WESLEY. « CRITICAL PHENOMENA IN HYDROTHERMAL SYSTEMS : STATE, THERMODYNAMIC, TRANSPORT, AND ELECTROSTATIC PROPERTIES OF WATER IN THE CRITICAL REGION ». Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184147.

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The H₂O critical point defines the parabolic vertex of the p(T) vaporization boundary and, as a geometric consequence, a positive vertical asymptote for first partial derivatives of the equation of state. Convergence of these derivatives, isothermal compressibility and isobaric expansivity, to the critical asymptote effectively controls thermodynamic, electrostatic, and transport properties of fluid H₂O and dependent transport and chemical processes in hydrothermal systems. The equation of state for fluid H₂O developed by Levelt Sengers et a1. (1983a) from modern theories of revised and extended scaling affords accurate prediction of state and thermodynamic properties in the critical region. This formulation has been used together with the virial equation of state proposed by Haar et a1. (1984) and predictive equations for the static dielectric constant (Uematsu and Franck, 1980), thermal conductivity (Sengers et a1., 1984), and dynamic viscosity (Sengers and Kamgar-Parsi, 1984) to present a comprehensive summary of fluid H₂O properties within and near the critical region. Specifically, predictive formulations and computed values for twenty-one properties are presented as a series of equations, three-dimensional P-T surfaces, isothermal and isobaric crosssections, and skeleton tables from 350°-475°C and 200-450 bar. The properties considered are density, isothermal compressibility, isobaric expansivity, Helmholtz and Gibbs free energies, internal energy, enthalpy, entropy, isochoric and isobaric heat capacities, the static dielectric constant, Z, Y, and Q Born functions (Helgeson and Kirkham, 1974a), dynamic and kinematic viscosity, thermal conductivity, thermal diffusivity, the Prandtl number, the isochoric expansivity-compressibility coefficient, and sound velocity. The equations and surfaces are analyzed with particular emphasis on functional form in the near-critical region and resultant extrema that persist well beyond the critical region. Such extrema in isobaric expansivity, isobaric heat capacity, and kinematic viscosity delineate state conditions that define local maxima in fluid and convective heat fluxes in hydrothermal systems; at the critical point, these fluxes are infinite in permeable media. Extrema in the Q and Y Born functions delineate state conditions that define local minima in the standard partial molal volumes and enthalpies of aqueous ions and complexes; at the critical point, these properties are negative infinite. Because these fluxes and thermodynamic properties converge to vertical asymptotes at the critical point, seemingly trivial variations in near-critical state conditions cause large variations in fluid mass and thermal energy transfer rates and in the state of chemical equilibrium.
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Lucken, Romain. « Theory and simulation of low-pressure plasma transport phenomena : Application to the PEGASES Thruster ». Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX046/document.

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Le domaine de la physique des plasmas froids a émergé avec les premières découvertes fondamentales en physique atomique et en physique des plasmas il y a plus d’un siècle. Toutefois, ce domaine a été rapidement orienté vers les applications. L’une des plus importantes dans la première moitié du XXème est le "Calutron" (California University Cyclotron), inventé par E. Lawrence à Berkeley, qui faisait partie du projet Manhattan, et utilisé comme un spectromètre de masse pour séparer les isotopes de l’uranium. Dans un rapport du projet Manhattan daté de 1949, D. Bohm fait deux observations qui sont fondamentales pour la physique des plasmas froids :(i) Les ions doivent avoir une énergie cinétique minimales lorsqu’ils entrent dans la gaine du plasma, estimée à Te/2, Te étant la température électronique.(ii) Le transport du plasma à travers un champ magnétique est augmenté par des instabilités.La propulsion électrique par plasma est utilisée pour des satellites militaires et des sondes spatiales depuis les années 1960 et a suscité un intérêt grandissant ces vingt dernières années avec le développement des applications commerciales des technologies spatiales. Néanmoins, les mêmes questions que celles auxquelles D. Bohm était confronté, c’est-à-dire le transport multidimensionnel, l’interaction plasma-gaine, et les instabilités, se posent toujours. La théorie et les simulations sont d’autant plus importantes pour la conception des systèmes de propulsion électrique que les tests en conditions réelles nécessitent le lancement d’un satellite dans l’espace.Dans ce travail, nous établissons les équations du transport multidimensionnel dans un plasma isotherme, nous proposons un critère de gaine qui permet de rendre compte de la saturation du champ magnétique dans un plasma froid et faiblement ionisé, et nous modélisons le refroidissement des électrons à travers le filtre magnétique du propulseur PEGASES (Plasma Propulsion with Electronegative Gases). Toutes les théories sont motivées et validées par un grand nombre de simulations particulaires PIC bi-dimensionnelles, en utilisant le code LPPic qui a été partiellement développé dans le cadre du projet. Enfin, les cas de simulation sont étendus à une décharge inductive à plasma dans l’iode, avec un nouvel ensemble de section efficaces de réaction
The field of low temperature plasma physics has emerged from the first fundamental discoveries in atom and plasma physics more than a century ago. However, it has soon become very much driven by applications. One of the most important of them in the first half of the XXth century is the "Calutron" (California University Cyclotron) invented by E.~Lawrence in Berkeley, that was part of the Manhattan project, and operated as a mass spectrometer to separate uranium isotopes. In a 1949 report of the Manhattan project, D.~Bohm makes two observations that are fundamental for low-temperature plasma physics.(i) The ions must have minimum kinetic energy when they enter the plasma sheath estimated to T_e/2 , Te being the electron temperature in eV ;(ii) Plasma transport across a magnetic field is enhanced by instabilities.Plasma electric propulsion is used on military satellites and space probes since the 1960s and has gained more and more interest for the last twenty years as space commercial applications were developing. However, the same questions as the ones D.~Bohm was faced with, namely multi-dimensional transport, plasma sheath interaction, and instabilities, arise. Theory and simulation are even more important for electric space propulsion systems design since testing in real conditions involves to launch a satellite into space.In this work, we derive the equations of the multi-dimensional isothermal plasma transport, we establish a sheath criterion that causes the magnetic confinement to saturate in low-temperature, weakly ionized plasmas, and we model the electron cooling through the magnetic filter of the PEGASES (Plasma Propulsion with Electronegative Gases) thruster. All the theories are driven and validated with extensive two-dimensional particle-in-cell (PIC) simulations, using the LPPic code that was partially developed in the frame of this project. Finally, the simulation cases are extended to an iodine inductively coupled plasma (ICP) discharge with a new set of reaction cross sections
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Livres sur le sujet "Electrical Transport Phenomena"

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Electrokinetic and colloid transport phenomena. Hoboken, NJ : Wiley-Interscience, 2006.

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Masliyah, Jacob H. Electrokinetic and colloid transport phenomena. Hoboken, NJ : J. Wiley, 2006.

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Vladislav, Cápek, dir. Organic molecular crystals : Interaction, localization, and transport phenomena. New York : American Institute of Physics, 1994.

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Electron transport in nanostructures and mesoscopic devices. London, UK : ISTE ; Hoboken, NJ : Wiley, 2008.

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Siliņš, E. Organic molecular crystals : Interaction,localization, and transport phenomena. New York : American Institute of Physics, 1994.

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Weiss, T. F. Cellular Biophysics, Vol. 2 : Electrical Properties. The MIT Press, 1996.

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Aseyev, G. G. Electrolytes : Transport Phenomena, Calculation of Multicomponent Systems and Experimental Data on Electrical Conductivity. Begell House Publishers, 2000.

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Burton, J. D., et E. Y. Tsymbal. Magnetoresistive phenomena in nanoscale magnetic contacts. Sous la direction de A. V. Narlikar et Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533046.013.18.

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This article examines magnetoresistive phenomena in nano- and atomic-size ferromagnetic metal contacts. In particular, it considers how magnetization affects the flow of electrical current in ferromagnetic materials by focusing on two major categories of magnetoresistive phenomena: the ‘spin-valve’, where the flow of spin-polarized electrical current is affected by an inhomogeneous magnetization profile, and anisotropic magnetoresistance (AMR), which involves the anisotropy of electrical transport properties with respect to the orientation of the magnetization. The article first provides an overview of ballistic transport and conductance quantization before discussing domain-wall magnetoresistance at the nanoscale. It also describes AMR in magnetic nanocontacts as well as tunnelling anisotropic magnetoresistance in broken contacts.
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Masliyah, Jacob H., et Subir Bhattacharjee. Electrokinetic and Colloid Transport Phenomena. Wiley & Sons, Incorporated, John, 2006.

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Masliyah, Jacob H., et Subir Bhattacharjee. Electrokinetic and Colloid Transport Phenomena. Wiley & Sons, Incorporated, John, 2008.

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Chapitres de livres sur le sujet "Electrical Transport Phenomena"

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Li, Zhi Gang, Xin Wei Zhao, Shi Bing Long, Li Hui Zhang et Ming Liu. « Electrical Transport Properties in Self-Assembled Erbium Disilicide Nanowires ». Dans Solid State Phenomena, 413–16. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-30-2.413.

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Mezhericher, Maksim. « Transport Phenomena in Engineering Problems : CFD-Based Computational Modeling ». Dans Lecture Notes in Electrical Engineering, 187–200. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6190-2_15.

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Beilis, Isak. « The Transport Equations and Diffusion Phenomena in Multicomponent Plasma ». Dans Plasma and Spot Phenomena in Electrical Arcs, 101–12. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44747-2_4.

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Ausloos, M., S. K. Patapis et P. Clippe. « Superconductivity Fluctuation Effects on Electrical and Thermal Transport Phenomena. H=0,T>TcI ». Dans Physics and Materials Science of High Temperature Superconductors, II, 755–85. Dordrecht : Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2462-1_50.

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Mauri, Roberto. « Transport of Electric Charges in Electrolytes ». Dans Transport Phenomena in Multiphase Flows, 375–87. Cham : Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-28920-0_23.

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Banerjee, Jyoti Prasad, et Suranjana Banerjee. « Transport Phenomena in Quantum Nanostructures under an Electric Field ». Dans Physics of Semiconductors and Nanostructures, 293–323. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2019] | : CRC Press, 2019. http://dx.doi.org/10.1201/9781315156804-7.

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« 14. Electrical Properties. Transport Phenomena ». Dans Subject and Author Index 1985, 210–61. De Gruyter, 1985. http://dx.doi.org/10.1515/9783112484081-017.

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Fisher, Robert. « Transport Phenomena and Biomimetic Systems ». Dans Electrical Engineering Handbook. CRC Press, 1999. http://dx.doi.org/10.1201/9781420049510.sec10.

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Sousa, João B., João O. Ventura et André Pereira. « Electrical measurements ». Dans Transport Phenomena in Micro- and Nanoscale Functional Materials and Devices, 191–207. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-323-46097-2.00008-2.

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Newnham, Robert E. « Electrical resistivity ». Dans Properties of Materials. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780198520757.003.0019.

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The next six chapters describe the transport phenomena associated with the flow of charge, heat, and matter. In each case there is a vector flux that is governed by a vector field. Linear relationships between flux and field include electrical resistivity (Chapter 17), thermal conductivity (Chapter 18), diffusion (Chapter 19), and thermoelectricity (Chapter 21). All are represented by second rank tensors similar to electric permittivity (Chapter 9), but the underlying physics is somewhat different. Transport properties are nonequilibrium phenomena governed by statistical mechanics and the concept of microscopic reversibility, rather than the second law of thermodynamics that applies to equilibrium properties such as specific heat, permittivity, and elasticity. Higher order tensors appear when the transport experiments are carried out in the presence of magnetic fields or mechanical stresses. Galvanomagnetic, thermomagnetic (Chapter 20), and piezoresistance effects (Chapter 22) require third- and fourth-rank tensors. When an electric field is applied to a conductor, an electric current flows through the sample. The field Ei (in V/m) is related to the current density Jj (in A/m2) through Ohm’s Law, where ρij is the electrical resistivity (in Ω m). In tensor form, . . . Ei = ρijJj . . . Ei and Jj are polar vectors (first rank polar tensors) and ρij is a second rank polar tensor property which follows Neumann’s law in the usual way. Sometimes it is more convenient to use the reciprocal relation involving the electrical conductivity σij : . . . Ji = σijEj . . . .
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Actes de conférences sur le sujet "Electrical Transport Phenomena"

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Sessler, G. M., B. Hahn et D. Y. Yoon. « Charge transport in Kapton ». Dans Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1985. IEEE, 1985. http://dx.doi.org/10.1109/ceidp.1985.7728266.

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Petříková, Michaela, Lukáš Fiala, Igor Medveď et Robert Černý. « Hygro-thermo-electrical modeling of transport phenomena in aluminosilicate composites ». Dans INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5043731.

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Xu, Wei, Hong Xue, Mark Bachman et G. P. Li. « Mass Transport Phenomena in Superhydrophobic Surfaces ». Dans ASME 2004 3rd Integrated Nanosystems Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/nano2004-46083.

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We present results of a droplet placed on a controlled super-hydrophobic surface cooled underneath by a thermal electrical cooler to demonstrate quick change in contact angles from the Cassie composite contact state to the Wenzel wetting contact state. The measured contact angles are compared with the theoretical predictions of Cassie’s and Wenzel’s equations and found to be consistent. The actual details of the transition phenomena are observed under a microscope through a specially designed one-dimensional micro-channel with concaved structures at the two sidewalls. It is found that the temperature gradient enhanced mass transfer can cause a rapid condensation in the air-filled cavities, which is believed to be the possible mechanism to trigger the energy state transition and explain instabilities of super-hydrophobic surfaces at the Cassie state. The phenomenon of mass transport into micro and nanocavities is important in understanding the nature of nano-structured super-hydrophobic surfaces.
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Guochang Li, George Chen et Shengtao Li. « Charge transport characteristics in nanodielectrics ». Dans 2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP). IEEE, 2016. http://dx.doi.org/10.1109/ceidp.2016.7784486.

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Maurya, Arvind, Fuminori Honda, Yusei Shimizu, Ai Nakamura, Yoshiki J. Sato, Yoshiya Homma, DeXin Li et Dai Aoki. « Electrical Transport under Pressure in Non-centrosymmetric URhSn ». Dans Proceedings of J-Physics 2019 : International Conference on Multipole Physics and Related Phenomena. Journal of the Physical Society of Japan, 2020. http://dx.doi.org/10.7566/jpscp.29.014003.

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Okoniewski, A. M., C. Tannous et A. Yelon. « Small polaron transport in thin films of SiNniH ». Dans Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1986. IEEE, 1986. http://dx.doi.org/10.1109/ceidp.1986.7726436.

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DiMaria, D. J., et M. V. Fischetti. « Electron transport and heating in silicon dioxide films ». Dans Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987. IEEE, 1987. http://dx.doi.org/10.1109/ceidp.1987.7736554.

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Zahn, Markus, et Jorge Mescua. « Bipolar charge transport analysis in high voltage stressed dielectrics ». Dans Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1985. IEEE, 1985. http://dx.doi.org/10.1109/ceidp.1985.7728258.

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Crine, Jean-Pierre. « Charge injection and transport in dielectrics : Myths and reality ». Dans Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1986. IEEE, 1986. http://dx.doi.org/10.1109/ceidp.1986.7726419.

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Jonscher, A. K., et E. F. Owede. « Time- and frequency-resolved surface transport on humid insulators ». Dans Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987. IEEE, 1987. http://dx.doi.org/10.1109/ceidp.1987.7736604.

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