Articles de revues : « Disordered Materials - Properties »

1

Julien, C. « Electrochemical properties of disordered cathode materials ». Ionics 2, n^o 3-4 (mai 1996) : 169–78. http://dx.doi.org/10.1007/bf02376017.

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Chauvet, O., L. Zuppiroli et I. Solomon. « Electronic properties of disordered SiC materials ». Materials Science and Engineering : B 11, n^o 1-4 (janvier 1992) : 303–6. http://dx.doi.org/10.1016/0921-5107(92)90229-3.

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Fanchini, G., S. C. Ray et A. Tagliaferro. « Optical properties of disordered carbon-based materials ». Surface and Coatings Technology 151-152 (mars 2002) : 233–41. http://dx.doi.org/10.1016/s0257-8972(01)01658-9.

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Schaefer, Dale W. « Fractal Models and the Structure of Materials ». MRS Bulletin 13, n^o 2 (février 1988) : 22–27. http://dx.doi.org/10.1557/s088376940006632x.

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Science often advances through the introdction of new ideas which simplify the understanding of complex problems. Materials science is no exception to this rule. Concepts such as nucleation in crystal growth and spinodal decomposition, for example, have played essential roles in the modern understanding of the structure of materials. More recently, fractal geometry has emerged as an essential idea for understanding the kinetic growth of disordered materials. This review will introduce the concept of fractal geometry and demonstrate its application to the understanding of the structure of materials.Fractal geometry is a natural concept used to describe random or disordered objects ranging from branched polymers to the earth's surface. Disordered materials seldom display translational or rotational symmetry so conventional crystallographic classification is of no value. These materials, however, often display “dilation symmetry,” which means they look geometrically self-similar under transformation of scale such as changing the magnification of a microscope. Surprisingly, most kinetic growth processes produce objects with self-similar fractal properties. It is now becoming clear that the origin of dilation symmetry is found in disorderly kinetic growth processes present in the formation of these materials.

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Eckert, J., G. D. Stucky et A. K. Cheetham. « Partially Disordered Inorganic Materials ». MRS Bulletin 24, n^o 5 (mai 1999) : 31–41. http://dx.doi.org/10.1557/s0883769400052301.

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It is widely recognized that the presence of defects in crystals and other solid materials can have a profound effect upon their chemical and physical properties and, consequently, that defects have a major impact on the practical utility of many technological materials. The presence of defects in a crystalline material implies the presence of disorder, and the extent of such disorder can range from very minor, such as the occurrence of Schottky defects in a crystal of sodium chloride, to maximum disorder, as in an amorphous material. The focus of this overview is on systems that are partially disordered, spanning the range between—but not including—sodium chloride and an amorphous material. Even within this range, the aim is not to be comprehensive, since for space reasons we have restricted our coverage to inorganic materials and hybrid inorganic-organic systems. The choice of this topic stems from both its fundamental and practical importance; it is also a very timely topic. For example, there is a great deal of current interest in complex, partially ordered materials such as the surfactant-mediated mesoporous silicas, biominerals, and hybrid organic-inorganic composites. Research on such materials has presented challenges that cannot easily be addressed by characterization tools that have been developed for well-ordered materials. The same situation is found in other areas such as carbons (including nanotubes) and glassy metal oxides.

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Jarlborg, T., et E. G. Moroni. « Electronic structure and vibrational properties in disordered materials ». Physica Scripta T57 (1 janvier 1995) : 64–68. http://dx.doi.org/10.1088/0031-8949/1995/t57/009.

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Im, Soohyun, Gabriel Calderon Ortiz, Mehrdad Abbasi Gharacheh, Robert Williams et Jinwoo Hwang. « Connecting Structural Heterogeneity to Properties of Disordered Materials ». Microscopy and Microanalysis 26, S2 (30 juillet 2020) : 714–16. http://dx.doi.org/10.1017/s1431927620015615.

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Wu, Bi-Yi, Xin-Qing Sheng et Yang Hao. « Effective media properties of hyperuniform disordered composite materials ». PLOS ONE 12, n^o 10 (5 octobre 2017) : e0185921. http://dx.doi.org/10.1371/journal.pone.0185921.

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Lu, Peng Xian. « Thermoelectric Properties of Binary-Phased Nanocomposites ». Materials Science Forum 809-810 (décembre 2014) : 3–8. http://dx.doi.org/10.4028/www.scientific.net/msf.809-810.3.

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In order to increase the electrical conductivity greatly but maintain a large Seebeck coefficient and a low thermal conductivity simultaneously, the binary-phased LaCeFe3CoSb12-Sb nanocomposites composed of LaCeFe3CoSb12skutterudite nanospheres and semimetal Sb microsized ribbons were fabricated via a hydro/solvo thermal route. The results suggest that the Sb powders result in a disordered structure during a hot-press process at its melting-point temperature and the disordered structure has been partly preserved into the room-temperature materials successfully. The Sb microsized ribbons enhance the electrical conductivity of the binary-phased materials largely, meanwhile the disordered structure increases the Seebeck coefficient obviously even though the thermal conductivity is also increased slightly. Consequently, the figure of merit of the binary-phased materials is improved significantly and the maximum value of 1.54 at 773 K has been realized for the LaCeFe3CoSb15material.

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Pendry, J. B., et E. Castano. « Electronic properties of disordered materials : a symmetric group approach ». Journal of Physics C : Solid State Physics 21, n^o 23 (20 août 1988) : 4333–55. http://dx.doi.org/10.1088/0022-3719/21/23/016.

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McPhedran, R. C., L. C. Botten, A. A. Asatryan, N. A. Nicorovici, C. Martijn de Sterke et P. A. Robinson. « Ordered and Disordered Photonic Band Gap Materials ». Australian Journal of Physics 52, n^o 5 (1999) : 791. http://dx.doi.org/10.1071/ph98110.

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We discuss a formulation and computer implementation of a new method that can be used to determine the electromagnetic properties of ordered and disordered dielectric and metallic cylinders, using periodic boundary conditions in one direction. We show results which exhibit strong parallels with the behaviour of electrons in disordered semiconductors, but also illustrate some characteristics which clearly differentiate between photonic and electronic behaviour. Among these are strong polarisation sensitivity and effects due to metallic absorption.

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Dorogovtsev, S. N., et N. K. Yushin. « Acoustical properties of disordered ferroelectrics ». Ferroelectrics 112, n^o 1 (décembre 1990) : 27–44. http://dx.doi.org/10.1080/00150199008012783.

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Kim, Hyunjeong. « Understanding the properties of energy materials from their local structure ». Acta Crystallographica Section A Foundations and Advances 70, a1 (5 août 2014) : C860. http://dx.doi.org/10.1107/s2053273314091396.

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Numerous energy materials with improved properties often show nano- or heavily disordered structural features which are hardly characterized by the conventional crystallographic technique alone. By using the atomic pair distribution function (PDF) analysis [1]on X-ray and neutron total scattering data, we have investigated various energy materials to elucidate structural features closely linked to their properties. Some of the examples are heavily disordered V1-xTixH2 for hydrogen storage [2] and layered Li1.2Mn0.567Ni0.166Co0.067O2 cathode material for lithium ion batteries. These materials possess an intricate structure and could easily lead to misleading results if one relies on only one structure probing technique. In this talk, I will show how their structural information was extracted from the x-ray and neutron PDFs obtained at BL22XU at SPring-8 and NOVA at J-PARC, respectively and how it was used with information available from other techniques to understand the properties of these energy materials.

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Beeby, J. L., et T. M. Hayes. « New method to calculate the electronic properties of disordered materials ». Physical Review B 32, n^o 10 (15 novembre 1985) : 6464–77. http://dx.doi.org/10.1103/physrevb.32.6464.

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Chen, D., et S. Torquato. « Designing disordered hyperuniform two-phase materials with novel physical properties ». Acta Materialia 142 (janvier 2018) : 152–61. http://dx.doi.org/10.1016/j.actamat.2017.09.053.

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Nitzan, Abraham, Rony Granek et Mark Ratner. « Mechanical properties of dynamically disordered networks ». Journal of Non-Crystalline Solids 131-133 (juin 1991) : 1018–21. http://dx.doi.org/10.1016/0022-3093(91)90717-k.

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Batt, G. M., et D. A. Rowlands. « Nonlocal spectral properties of disordered alloys ». Journal of Physics : Condensed Matter 18, n^o 48 (17 novembre 2006) : 11031–46. http://dx.doi.org/10.1088/0953-8984/18/48/031.

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Ouyang, Tao, Yuanping Chen, Yuee Xie, Kaike Yang et Jianxin Zhong. « Electronic properties of disordered bilayer graphene ». Solid State Communications 150, n^o 47-48 (décembre 2010) : 2366–69. http://dx.doi.org/10.1016/j.ssc.2010.09.049.

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Selinger, Robin L. B., et John M. Corbett. « Dynamic Fracture in Disordered Media ». MRS Bulletin 25, n^o 5 (mai 2000) : 46–50. http://dx.doi.org/10.1557/mrs2000.73.

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While it is possible to carry out fracture experiments in single crystals, in everyday experience fracture occurs in heterogeneous and often disordered materials. Tear a piece of paper, and the resulting ragged edge shows evidence of the local variation in the paper's mechanical properties. One might expect the same behavior in fracture of other disordered materials such as polycrystalline solids, fiber composites, and concrete.

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20

Zheng, Siming. « Magnetic Properties of Disordered Ising Ferrimagnets ». physica status solidi (b) 155, n^o 2 (1 octobre 1989) : 653–61. http://dx.doi.org/10.1002/pssb.2221550236.

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Golubev, Yevgeny A., et Igor V. Antonets. « Electrophysical Properties and Structure of Natural Disordered sp2 Carbon ». Nanomaterials 12, n^o 21 (27 octobre 2022) : 3797. http://dx.doi.org/10.3390/nano12213797.

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The progress in the practical use of glassy carbon materials has led to a considerable interest in understanding the nature of their physical properties. The electrophysical properties are among the most demanded properties. However, obtaining such materials is associated with expensive and dirty processes. In nature, in the course of geological processes, disordered sp2 carbon substances were formed, the structure of which is in many respects similar to the structure of glassy carbon and black carbon, and the electrical properties are distinguished by a high-energy storage potential and a high efficiency of shielding electromagnetic radiation. Given the huge natural reserves of such carbon (for example, in the shungite rocks of Karelia) and the relative cheapness and ease of producing materials from it, the study of potential technological applications and the disclosure of some unique electrophysical properties are of considerable interest. In this paper, we present an overview of recent studies on the structure, electrophysical properties, and technological applications of natural disordered sp2 carbon with the addition of novel authors’ results.

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Anderson, A. C. « Low temperature glassy properties of disordered crystals ». Phase Transitions 5, n^o 4 (septembre 1985) : 301–16. http://dx.doi.org/10.1080/01411598508219885.

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Ye, H. Q., P. H. Ping, D. X. Li, J. Y. Huang et Y. K. Wu. « Intergrainular structure and deformation mechanism in nanocrystalline materials ». Proceedings, annual meeting, Electron Microscopy Society of America 53 (13 août 1995) : 192–93. http://dx.doi.org/10.1017/s0424820100137331.

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It is recognized that boundary structure (GB) characterization is essential in order to understand the structure-properties relationship of nanocrystalline (NC). In most cases, NC materials have to suffer deformation during compacting or ball milling techniques, a deep and systematic study on deformation mechanism is also necessary. In this paper, characterization of microstructure in NC materials synthesized by three methods has been presented.1. Ordered and Disordered Regions at GBs of NC Pd The NC Pd samples were synthesized by the inert gas condensation and in situ compacting technique. The results of X-ray diffraction and HREM observations showed that the average grain size of the NC Pd is about 10 nm. It can be seen that most of the GBs have ordered structure and no 'gas-like' feature has been observed. Some disordered GB regions, such as nanovoid formed during compacting process, are also detected as marked by "V" in Fig.l. The structural modification from the disordered state was found during in situ HREM investigation.

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Chen, Chi, Yunxing Zuo, Weike Ye, Xiangguo Li et Shyue Ping Ong. « Learning properties of ordered and disordered materials from multi-fidelity data ». Nature Computational Science 1, n^o 1 (janvier 2021) : 46–53. http://dx.doi.org/10.1038/s43588-020-00002-x.

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NEILSON, DAVID, et D. J. W. GELDART. « LOW TEMPERATURE PROPERTIES OF 2D CORRELATED ELECTRONS IN WEAKLY DISORDERED MATERIALS ». International Journal of Modern Physics B 17, n^o 28 (10 novembre 2003) : 4987–97. http://dx.doi.org/10.1142/s0217979203020107.

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Transport properties of extremely high purity two-dimensional (2D) electron systems at low temperatures are still not well understood either experimentally or theoretically, even though these systems are fast becoming a mainstream basis of computing devices. In fact there are two separate issues to be resolved. The first of these has attracted the more attention. This is the existence of a quantum phase transition (the metal-insulator transition) in the low density 2D system at zero temperature. Experimentally, in spite of claims, from existing data at finite temperatures there is no conclusive evidence either way on the existence of a T = 0 quantum phase transition. There is a need for a unified theory encompassing, on the same level, both insulating and metallic behaviour to predict the cross-over. We propose a semi-empirical one parameter renormalisation group equation for the temperature dependent resistivity of a 2D electron system with weak disorder. The renormalisation group equation has a physically meaningful insulating limit and it predicts a metallic ground state of zero resistance at higher electron densities. The resulting temperature dependence of the resistivity is found to give a good fit to experimental data near the separatrix. The second issue is the mechanism behind the sudden change in the temperature dependence of the resistivity, as is actually observed at low but non-zero temperatures, T = 0.1 to 2 K. This phenomenon is well-documented experimentally and it is of interest in its own right whether or not there is an actual transition at T = 0. We present direct evidence of the important role of the electron Coulomb repulsion and exchange in determining these finite temperature properties by noting an empirical relationship between the critical density at the bifurcation point and parallel magnetic field. The relationship is controlled by properties of the electron-electron correlation function for the 2D electron system. This result provides direct evidence of the central role of the Coulomb repulsion and exchange in driving the bifurcation phenomenon.

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Govindaraj, G., et R. Murugaraj. « A new anomalous relaxation function and electrical properties of disordered materials ». Materials Science and Engineering : B 77, n^o 1 (août 2000) : 60–66. http://dx.doi.org/10.1016/s0921-5107(00)00467-0.

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Jiang, Qinghui, Haixue Yan, Jibran Khaliq, Yang Shen, Kevin Simpson et M. J. Reece. « Enhancement of thermoelectric properties by atomic-scale percolation in digenite CuxS ». J. Mater. Chem. A 2, n^o 25 (2014) : 9486–89. http://dx.doi.org/10.1039/c4ta01250j.

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Hu, Xiaoshi, Xiaobing Lou, Chao Li, Qun Chen, Qi Yang et Bingwen Hu. « Amorphization and disordering of metal–organic framework materials for rechargeable batteries by thermal treatment ». New Journal of Chemistry 41, n^o 14 (2017) : 6415–19. http://dx.doi.org/10.1039/c6nj04021g.

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O’Quinn, Eric C., Kurt E. Sickafus, Rodney C. Ewing, Gianguido Baldinozzi, Joerg C. Neuefeind, Matthew G. Tucker, Antonio F. Fuentes, Devon Drey et Maik K. Lang. « Predicting short-range order and correlated phenomena in disordered crystalline materials ». Science Advances 6, n^o 35 (août 2020) : eabc2758. http://dx.doi.org/10.1126/sciadv.abc2758.

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Disordered crystalline materials are used in a wide variety of energy-related technologies. Recent results from neutron total scattering experiments have shown that the atomic arrangements of many disordered crystalline materials are not random nor are they represented by the long-range structure observed from diffraction experiments. Despite the importance of disordered materials and the impact of disorder on the expression of physical properties, the underlying fundamental atomic-scale rules of disordering are not currently well understood. Here, we report that heterogeneous disordering (and associated structural distortions) can be understood by the straightforward application of Pauling’s rules (1929). This insight, corroborated by first principles calculations, can be used to predict the short-range, atomic-scale changes that result from structural disordering induced by extreme conditions associated with energy-related applications, such as high temperature, high pressure, and intense radiation fields.

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Tamáska, I., Z. Vértesy, A. Deák, P. Petrik, K. Kertész et László Biró. « Optical Properties of Bioinspired Disordered Photonic Nanoarchitectures ». Nanopages 8, n^o 2 (septembre 2013) : 17–30. http://dx.doi.org/10.1556/nano.2013.00006.

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Kaneyoshi, T., et Y. Nakamura. « Magnetic properties of disordered Ising ternary alloys ». Journal of Physics : Condensed Matter 10, n^o 24 (22 juin 1998) : 5359–72. http://dx.doi.org/10.1088/0953-8984/10/24/013.

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Samara, George A. « The relaxational properties of compositionally disordered ABO3perovskites ». Journal of Physics : Condensed Matter 15, n^o 9 (24 février 2003) : R367—R411. http://dx.doi.org/10.1088/0953-8984/15/9/202.

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Knoester, Jasper. « Collective nonlinear optical properties of disordered J-aggregates ». Advanced Materials 7, n^o 5 (mai 1995) : 500–502. http://dx.doi.org/10.1002/adma.19950070523.

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Yao, Danyu, Ting Wang, Xiaoli Zhang et Yuqing Wang. « High Concentration Crystalline Silk Fibroin Solution for Silk-Based Materials ». Materials 15, n^o 19 (6 octobre 2022) : 6930. http://dx.doi.org/10.3390/ma15196930.

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As a functional biomaterial, silk fibroin has been widely used in drug release, cell encapsulation and tissue regeneration. To meet the requirements of these applications, the properties of silk fibroin-based materials should be finely tunable. Many useful properties of biomaterials emerge from the collective interactions among ordered and disordered domains. Thus, increasing subtle control of silk hierarchical structures is required. As a characteristic of ordered silk fibroin, crystalline silk fibroin (CSF) is an important part of silk fibroin-based biomaterials, but the preparation of CSF solution, especially high concentration CSF solution, remains a challenge. Here, a solution composed of β-sheet-rich silk fibroin is reported. These CSF were obtained by the sonication of silk fibroin hydrogel, destroying the hydrogel network, and turning silk fibroin hydrogels into CSF solution. These β-sheet-rich CSF solutions were stable enough for several days or even weeks. In addition, they were typically ordered crystalline domains, which could be mixed with disordered domains and fabricated into porous scaffolds, films, hydrogels and other silk fibroin-based scaffolds with different properties.

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Vollath, D., D. V. Szabó, R. D. Taylor et J. O. Willis. « Synthesis and Magnetic Properties of Nanostructured Maghemite ». Journal of Materials Research 12, n^o 8 (août 1997) : 2175–82. http://dx.doi.org/10.1557/jmr.1997.0291.

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Nanocrystalline maghemite, γ–Fe2O3, can be synthesized in a microwave plasma using FeCl3 or Fe3(CO)12 as the precursor. Electron microscopy revealed particle sizes in the range of 5 to 10 nm. In general, this material is superparamagnetic. The magnetic properties are strongly dependent on the precursor. In both cases the production process leads to a highly disordered material with the consequence of a low magnetization. The assumption of a disordered structure is also supported by electron energy loss (EEL) and Mössbauer spectroscopy. The structure of this material shows a nearly identical number of cations on tetrahedral and octahedral lattice sites.

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VAEZ ALLAEI, S. M., et MUHAMMAD SAHIMI. « COMPUTING TRANSPORT PROPERTIES OF HETEROGENEOUS MEDIA BY AN OPTIMIZATION METHOD ». International Journal of Modern Physics C 16, n^o 01 (janvier 2005) : 1–16. http://dx.doi.org/10.1142/s0129183105006905.

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The problem of computing the effective transport and mechanical properties of disordered materials, modeled by random or correlated percolation networks, is studied as an optimization problem. We show that calculating an optimal distribution of the potentials (voltages, displacements, etc.) throughout a disordered material that minimizes its total energy reduces the computation times for calculating the effective properties by a factor that depending on the morphology of the system, ranges from 3 to 73. Hence, this offers significant speed-up over the most efficient numerical methods currently available.

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Nautiyal, Himanshu, Ketan Lohani, Binayak Mukherjee, Eleonora Isotta, Marcelo Augusto Malagutti, Narges Ataollahi, Ilaria Pallecchi et al. « Mechanochemical Synthesis of Sustainable Ternary and Quaternary Nanostructured Cu2SnS3, Cu2ZnSnS4, and Cu2ZnSnSe4 Chalcogenides for Thermoelectric Applications ». Nanomaterials 13, n^o 2 (16 janvier 2023) : 366. http://dx.doi.org/10.3390/nano13020366.

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Copper-based chalcogenides have emerged as promising thermoelectric materials due to their high thermoelectric performance, tunable transport properties, earth abundance and low toxicity. We have presented an overview of experimental results and first-principal calculations investigating the thermoelectric properties of various polymorphs of Cu2SnS3 (CTS), Cu2ZnSnS4 (CZTS), and Cu2ZnSnSe4 (CZTSe) synthesized by high-energy reactive mechanical alloying (ball milling). Of particular interest are the disordered polymorphs of these materials, which exhibit phonon-glass–electron-crystal behavior—a decoupling of electron and phonon transport properties. The interplay of cationic disorder and nanostructuring leads to ultra-low thermal conductivities while enhancing electronic transport. These beneficial transport properties are the consequence of a plethora of features, including trap states, anharmonicity, rattling, and conductive surface states, both topologically trivial and non-trivial. Based on experimental results and computational methods, this report aims to elucidate the details of the electronic and lattice transport properties, thereby confirming that the higher thermoelectric (TE) performance of disordered polymorphs is essentially due to their complex crystallographic structures. In addition, we have presented synchrotron X-ray diffraction (SR-XRD) measurements and ab initio molecular dynamics (AIMD) simulations of the root-mean-square displacement (RMSD) in these materials, confirming anharmonicity and bond inhomogeneity for disordered polymorphs.

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Reid, Daniel R., Nidhi Pashine, Justin M. Wozniak, Heinrich M. Jaeger, Andrea J. Liu, Sidney R. Nagel et Juan J. de Pablo. « Auxetic metamaterials from disordered networks ». Proceedings of the National Academy of Sciences 115, n^o 7 (30 janvier 2018) : E1384—E1390. http://dx.doi.org/10.1073/pnas.1717442115.

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Recent theoretical work suggests that systematic pruning of disordered networks consisting of nodes connected by springs can lead to materials that exhibit a host of unusual mechanical properties. In particular, global properties such as Poisson’s ratio or local responses related to deformation can be precisely altered. Tunable mechanical responses would be useful in areas ranging from impact mitigation to robotics and, more generally, for creation of metamaterials with engineered properties. However, experimental attempts to create auxetic materials based on pruning-based theoretical ideas have not been successful. Here we introduce a more realistic model of the networks, which incorporates angle-bending forces and the appropriate experimental boundary conditions. A sequential pruning strategy of select bonds in this model is then devised and implemented that enables engineering of specific mechanical behaviors upon deformation, both in the linear and in the nonlinear regimes. In particular, it is shown that Poisson’s ratio can be tuned to arbitrary values. The model and concepts discussed here are validated by preparing physical realizations of the networks designed in this manner, which are produced by laser cutting 2D sheets and are found to behave as predicted. Furthermore, by relying on optimization algorithms, we exploit the networks’ susceptibility to tuning to design networks that possess a distribution of stiffer and more compliant bonds and whose auxetic behavior is even greater than that of homogeneous networks. Taken together, the findings reported here serve to establish that pruned networks represent a promising platform for the creation of unique mechanical metamaterials.

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Fedoseev, A. I., S. G. Lushnikov, J. H. Ko et Seiji Kojima. « Elastic Properties of Disordered Lead Scandotantalate Crystal ». Ferroelectrics 320, n^o 1 (juillet 2005) : 75–78. http://dx.doi.org/10.1080/00150190590966838.

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Kourov, N. I., V. G. Pushin, Yu V. Knyazev et A. V. Korolev. « Electronic properties of strain-disordered Ni2.16Mn0.84Ga alloy ». Physics of the Solid State 49, n^o 9 (septembre 2007) : 1773–79. http://dx.doi.org/10.1134/s1063783407090272.

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Zheng, S. M. « Magnetic Properties of Disordered Square Ising Ferromagnets ». physica status solidi (b) 185, n^o 1 (1 septembre 1994) : K37—K42. http://dx.doi.org/10.1002/pssb.2221850135.

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Bahov, V. A., E. A. Nazderkin, A. S. Mazinov et L. D. Pisarenko. « Effect of structural heterogeneity on conductivity semiconductor materials ». Electronics and Communications 16, n^o 4 (31 mars 2011) : 11–14. http://dx.doi.org/10.20535/2312-1807.2011.16.4.242709.

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Complexity in understanding of the processes spotting the electrical properties of structured materials is considered from the side of the quantum representation of aperiodic structure. Determination of each of the view disordered aperiodic matrixes by means of statistical and energy parameters have allowed to describe the temperature dependences of the electroconductivity of the hydrogenated silicon amorphous films

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Arbabi, Sepehr, et Muhammad Sahimi. « Large Scale Computer Simulations of Static and Dynamic Properties of Disordered Materials ». Molecular Simulation 8, n^o 1-2 (décembre 1991) : 1–22. http://dx.doi.org/10.1080/08927029108022465.

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Leising, G. « Optical properties of highly oriented and disordered polyacetylene ». Synthetic Metals 28, n^o 3 (février 1989) : D215—D223. http://dx.doi.org/10.1016/0379-6779(89)90695-4.

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Deng, Baicheng, Xinhong Gong, Yujin Chen, Jianhua Huang, Yanfu Lin, Zundu Luo et Yidong Huang. « Polarized spectroscopic properties of disordered Er3+:Gd2SrAl2O7 crystal ». Optical Materials Express 11, n^o 3 (3 février 2021) : 603. http://dx.doi.org/10.1364/ome.413005.

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Weitz, D. A. « Mesoscopic Disorder ». MRS Bulletin 19, n^o 5 (mai 1994) : 11–13. http://dx.doi.org/10.1557/s0883769400036502.

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Disorder characterizes most of the materials that surround us in nature. Despite their great technological importance, materials with ordered crystalline structures are relatively rare. Examples of disordered materials, however, abound, and their forms can be as varied as their number. The paper on which these words are printed has a disordered structure composed of a highly interconnected network of fibers. It has also been coated with particulate materials to improve its properties and the visibility of the ink. The reading glasses you may require to focus on these words are composed of a glass or polymer material that is disordered on a molecular level. Even the structure of your hand holding this magazine is disordered. These and virtually all other disordered materials are typically parameterized by a characteristic length scale. Above this length scale, the material is homogeneous and the effects of the disorder are not directly manifest; below this characteristic length the disorder of the structure dominates, directly affecting the properties.The range of characteristic length scales for the disordered materials around us is immense. For the glass or polymer of your reading glasses, it is microscopic; the disorder is apparent only at the molecular level, while above this level the material is homogeneous. For the paper on which this magazine is printed, the scale is larger; the paper is white partly because the disordered fiber network has within it structures that are comparable in size to the wavelength of light, resulting in strong scattering of the light.

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SANCHEZ, JUAN R. « SCALING PROPERTIES OF DECONSTRUCTION INTERFACES IN DISORDERED MEDIA ». International Journal of Modern Physics C 12, n^o 01 (janvier 2001) : 71–78. http://dx.doi.org/10.1142/s0129183101001511.

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The scaling properties of interfaces generated by a disaggregation model in 1+1 dimensions are studied by numerical simulations. The model presented here for the disaggregation process takes into account the possibility of having quenched disorder in the bulk under deconstruction. The disorder can be considered to model several types of irregularities appearing in real materials (dislocations, impurities). The presence of irregularities makes the intensity of the attack to be not uniform. In order to include this effect, the computational bulk is considered to be composed by two types of particles: those particles which can be easily detached and other particles that are not sensible to the etching attack. As the detachment of particles proceeds in time, the dynamical properties of the rough interface are studied. The resulting one-dimensional surface show self-affine properties and the values of the scaling exponents are reported when the interface is still moving near the depinning transition. According to the scaling exponents presented here, the model must be considered to belong to a new universality class.

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Suga, S., et T. Ohashi. « Non-Fermi-liquid properties in disordered Kondo systems ». Journal of Physics : Condensed Matter 15, n^o 28 (4 juillet 2003) : S2219—S2222. http://dx.doi.org/10.1088/0953-8984/15/28/355.

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Heidrich-Meisner, Fabian. « Thermal transport properties of disordered spin- systems ». Physica B : Condensed Matter 378-380 (mai 2006) : 299–300. http://dx.doi.org/10.1016/j.physb.2006.01.548.

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Ivanov, S. A., S. G. Eriksson, Roland Tellgren et Håkan Rundlöf. « A Neutron Diffraction Study of Magnetically Ordered Ferroelectric Materials ». Materials Science Forum 443-444 (janvier 2004) : 383–86. http://dx.doi.org/10.4028/www.scientific.net/msf.443-444.383.

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Structural, magnetic, dielectric properties and Mossbauer effect were investigated on complex perovskite with composition AFe2/3B1/3O3(A=Ca,Sr,Pb,Ba; B=W,Te). The most striking feature of this type of complex perovskites is the coexistence of magnetic and antiferroelectric types of ordering in a certain temperature interval. It was found that ferrimagnetic Ca and Sr compounds belong to a partially ordered perovskite structure, and antiferromagnetic Pb phase to a disordered one. The possible models for nuclear and magnetic structures were proposed in accordance with the observed dielectric and magnetic properties.

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