Relevant bibliographies by topics / Iron-based superconductors

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Academic literature on the topic 'Iron-based superconductors'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Iron-based superconductors"

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Chen, Xianhui, Pengcheng Dai, Donglai Feng, Tao Xiang, and Fu-Chun Zhang. "Iron-based high transition temperature superconductors." National Science Review 1, no. 3 (July 3, 2014): 371–95. http://dx.doi.org/10.1093/nsr/nwu007.

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Abstract In a superconductor electrons form pairs and electric transport becomes dissipation-less at low temperatures. Recently discovered iron-based superconductors have the highest superconducting transition temperature next to copper oxides. In this article, we review material aspects and physical properties of iron-based superconductors. We discuss the dependence of transition temperature on the crystal structure, the interplay between antiferromagnetism and superconductivity by examining neutron scattering experiments, and the electronic properties of these compounds obtained by angle-resolved photoemission spectroscopy in link with some results from scanning tunneling microscopy/spectroscopy measurements. Possible microscopic model for this class of compounds is discussed from a strong coupling point of view.
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Day, Charles. "Iron-based superconductors." Physics Today 62, no. 8 (August 2009): 36–40. http://dx.doi.org/10.1063/1.3206093.

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Changjan, Arpapong, and Pongkaew Udomsamuthirun. "London Penetration Depth of Fe-Based Superconductors." Advanced Materials Research 979 (June 2014): 297–301. http://dx.doi.org/10.4028/www.scientific.net/amr.979.297.

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Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. Fe-based superconductors are superconductors whose containing iron compounds and having a very high critical magnetic field. London penetration depth can assist in the study of the behavior of the critical magnetic field. The London penetration depth is the distance to which a magnetic field penetrates into a superconductor and becomes equal to 0.367879 times that of the magnetic field at the surface of the superconductor. In this paper, the London penetration depth of Fe-based superconductors is studied by Ginzburg-Landau scenery. Free energy of Fe-based superconductors is assumed by modified the free energy of two-band magnetic superconductors model and theof Fe-based superconductors is derived analytically. Finally, the temperature dependence of is investigated and applied to Single-Crystal superconductors.
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Stajic, J. "Describing iron-based superconductors." Science 346, no. 6211 (November 13, 2014): 823–24. http://dx.doi.org/10.1126/science.346.6211.823-d.

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YOSHIZAWA, MASAHITO, and SHALAMUJIANG SIMAYI. "ANOMALOUS ELASTIC BEHAVIOR AND ITS CORRELATION WITH SUPERCONDUCTIVITY IN IRON-BASED SUPERCONDUCTOR Ba(Fe1-xCox)2As2." Modern Physics Letters B 26, no. 19 (June 27, 2012): 1230011. http://dx.doi.org/10.1142/s0217984912300116.

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Elastic properties of iron-based superconductor Ba ( Fe 1-x Co x)2 As 2 with various Co concentrations x were reviewed. Among all elastic constants, C66 shows remarkable softening associated with the structural transition from tetragonal to orthorhombic. The amount of anomaly in C66 is 90% for the underdoped samples of x < 0.07 For the overdoped samples, the anomalies in C66 gradually disappear with the increasing of Co concentration. The elastic compliance S66 (= 1/C66) shows a quantum critical behavior, which behaves just like the magnetic susceptibility of unconventional superconductors. There exists a clear correlation between the superconducting transition temperature and the amount of anomaly in S66. It was suggested that the structural fluctuation, which is measured by S66, plays an important role in the emergence of superconductivity. The elastic anomaly of Ba ( Fe 1-x Co x)2 As 2 is characterized by a strong electron–lattice coupling, which would be originated from the 3d orbitals of iron. This might be a universal phenomenon not only in iron-based superconductors but also d-electron based superconductors. The results on Ba ( Fe 1-x Co x)2 As 2 would reveal relevant roles of the structural fluctuations due to the orbitals, which should be taken into account for the understanding of a whole picture of the superconductivity in iron-based superconductors and related materials.
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MIN, Byeong Hun, and Yong Seung KWON. "Iron-based High-TC Superconductors." Physics and High Technology 23, no. 4 (April 30, 2014): 21. http://dx.doi.org/10.3938/phit.23.013.

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JANKOWSKI, Arkadiusz. "Iron - based superconductors - development prospects." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 1 (January 5, 2018): 47–50. http://dx.doi.org/10.15199/48.2018.01.12.

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Hosono, Hideo, and Zhi-An Ren. "Focus on Iron-Based Superconductors." New Journal of Physics 11, no. 2 (February 27, 2009): 025003. http://dx.doi.org/10.1088/1367-2630/11/2/025003.

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ZHANG, A. M., and Q. M. ZHANG. "RAMAN SCATTERING IN IRON-BASED SUPERCONDUCTORS." Modern Physics Letters B 26, no. 28 (October 8, 2012): 1230020. http://dx.doi.org/10.1142/s0217984912300207.

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Iron-based superconducting layered compounds have the second highest transition temperature after cuprate superconductors. Their discovery is a milestone in the history of high-temperature superconductivity and will have profound implications for high-temperature superconducting mechanism as well as industrial applications. Raman scattering has been extensively applied to correlated electron systems including the new superconductors due to its unique ability to probe multiple primary excitations and their coupling. In this review, we will give a brief summary of the existing Raman experiments in the iron-based materials and their implications for pairing mechanism in particular. And we will also address some open issues from the experiments.
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Tang, Shaoqiang, Hogliang Pan, and Zhao Xu. "Progress in the research of copper-oxide superconductors." Transportation Systems and Technology 4, no. 3 suppl. 1 (November 19, 2018): 203–11. http://dx.doi.org/10.17816/transsyst201843s1203-211.

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Since H·Carvalin·Onnesse discovered the superconductivity of mercury in 1911, we have made progress in the research of the superconductor and the superconductor have evolved from single element, alloy to complex compounds with multiple elements.With the development of the research about new superconducting materials, the research of iron based superconductors, copper-oxide superconductor and magnesium boride superconductor is the latest research trend. So far the proved highest superconducting transition temperature of copper-oxide superconductor is 130 K under normal pressure and could reach more than 160 K under high pressure. Based on the experience accumulated in past decades, we propose some general introduction about the main structure type, the superconducting principle and the application of copper-oxide superconductor.It is expected that a positive effect would be made in the research of copper-oxide superconductor. Background: Since H·Carvalin·Onnesse discovered the superconductivity of mercury in 1911, we have made progress in the research of the superconductor and the superconductor have evolved from single element, alloy to complex compounds with multiple elements. Aim: The purpose of this paper is to explain the differences between copper oxide superconductors and conventional superconductors and their superconducting mechanism. Methods: The superconducting mechanism and structure of copper oxide superconductors were analyzed by means of literature investigation, conceptual analysis and comparative study. Results: In this paper, the different structure forms of copper oxide are analyzed, and its superconducting mechanism is described in detail. The applications of several main copper oxide superconductors are introduced. Conclusion: Based on the experience accumulated in past decades, we propose some general introduction about the main structure type, the superconducting principle and the application of copper-oxide superconductor.It is expected that a positive effect would be made in the research of copper-oxide superconductor.
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Dissertations / Theses on the topic "Iron-based superconductors"

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Friederichs, Gina. "Iron-based superconductors via soft chemistry." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-185306.

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Demirdis, Sultan. "Effects of disorder in iron-based superconductors." Palaiseau, Ecole polytechnique, 2012. https://pastel.hal.science/docs/00/77/89/43/PDF/thesis.pdf.

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L'ancrage des vortex est utilisé comme une sonde pour l'identification du type de désordre et son effet sur la supraconductivité dans la famille 122 des supraconducteurs à base de fer. Une nouvelle technique d'analyse obtenue d'images de décoration de Bitter prenant en compte l'interaction de chaque vortex avec ses voisins, a permis d'obtenir l'énergie et la force de piégeage dans Ba(Fe1-xCox)2As2, dans le régime de bas champ magnétique. La corrélation avec des mesures de courant critique Jc a montré que le piégeage des vortex dans ce composé est due à l'hétérogénéité des propriétés supraconductrices sur une échelle de 20-100 nm. Application de la même méthode d'analyse pour les vortex dans le BaFe2(As1-xPx)2 a montré que l'énergie et la force d'ancrage dépendent du dopage x. Les mesures de Jc et de la distribution des forces de piégeage ont montré que la distance moyenne entre différents centres de piégeage est de l'ordre de 90 nm et que cette distance augmente quand on augmente le conteneur en P. La combinaison de ces résultats avec les mesures de Jc mène à la conclusion que l'ancrage fort des lignes de flux due à l'hétérogénéité des propriétés supraconductrice à l'échelle de nm est à l'origine de la constante observé à des champ faibles dans les courbes de Jc ainsi que la diminution en loi de puissance qui suit. On traite également la contribution d'ancrage faible collectif à Jc, qui se manifeste à des champs magnétiques plus importants, de l'ordre de 1 T. Cette contribution a été analysée en terme de la diffusion des quasiparticules et de la fluctuation spatiale du libre parcours moyen. Afin de tester l'hypothèse avancé ci-dessus, l'irradiation aux électrons d'énergie 2. 5 MeV, sur les composés dopé au Co, Ni et P de la famille 122 a été réalisé à des différentes doses pour plusieurs dopage de ces matériaux. Ce type d'irradiation introduit des défauts ponctuels de taille atomique dans le matériau. La température critique Tc de tous les matériaux étudiés diminue après irradiation de façon similaire. Une claire augmentation de la contribution d'ancrage faible collectif à Jc dans le composé dopé au Co a été observée. De plus, cette contribution qui, avant irradiation, était absente dans tous les dopages du composé au P, apparait après irradiation. Les défauts ponctuels de taille atomique, diffuseur des quasiparticules, dans les supraconducteurs à base de fer sont donc à l'origine de la contribution d'ancrage faible collectif à Jc
The pinning of vortices is used as a probe for the identification of disorder and its effect on superconductivity in 122-type iron-based superconductors. Using a new analysis method taking into account the interaction of individual vortices with their neighbors, pinning energies and pinning forces in Ba(Fe1-xCox)2As2 are extracted from the vortex distributions in the regime of small fields. The correlation of measurements of the critical current density Jc with the spatial distribution of vortices shows that pinning in this particular regime is due to the heterogeneity of superconducting properties, on the scale of 20-100 nm. Application of the same analysis procedure on the vortex structure in BaFe2(As1-xPx)2 with less density fluctuations, shows that the pinning forces and energies depend on the doping level x. Both Jc measurements and pinning force distributions independently yield a mean distance between pinning centers of about 90 nm, increasing with increasing P-content x. Combination of the above results and critical current density measurements lead to the conclusion that the low field plateau observed in Jc curves, followed by a power-law decrease, emerges from strong pinning due to nm scale heterogeneity of superconducting properties. Attention is also paid to the weak collective pinning contribution that manifests itself at higher fields > 1 T. Notably, this contribution is consistently analyzed in terms of quasiparticle scattering and mean free path fluctuations. In order to test this premise irradiation of Co, Ni and P-doped 122-type iron-based compounds with high-energy 2. 5 MeV electrons is performed for several doping levels of the materials and to different doses. Such irradiation introduces atomic sized point-like defects. Following irradiation it appears that the critical temperature Tc shows a similar depression for all studied materials. The weak collective contribution to Jc in Co-doped is found to clearly increase. Moreover this contribution appears after irradiation of the P-doped compound in which it was previously absent. This allows one to confirm the role of atomic point-like pins as scatterers in Ni and Co-doped compounds, as well as the hypothesis that these defects are at the origin of the weak collective pinning contribution to Jc at larger fields
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Watson, Matthew D. "Electronic and magnetic properties of iron-based superconductors." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:7239fcb6-8117-4023-b68e-c6bbe2d4af22.

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This thesis presents experimental studies of the electronic and magnetic properties of several iron-based unconventional superconductors, primarily using the techniques of magnetotransport and torque magnetometry in high magnetic fields and synchrotron-based angle-resolved photo-emission spectroscopy (ARPES). Superconductivity in the iron-based superconductors is always found in proximity to a magnetic phase, and the details of the electronic structure and Fermi surface are also important in determining the strength of interactions, and ultimately superconductivity. This motivates the experimental studies of electronic, magnetic and superconducting properties of Fe-based superconductors presented in this thesis. First, quantum oscillation measurements using high-field torque magnetometry are used to provide a partial determination of the Fermi surface of superconducting LiFeAs. The data are compared with density functional theory calculations, finding strong mass enhancements on the observed electron bands, however the hole bands are not observed. A large portion of this thesis concerns experiments on FeSe, which uniquely has a structural transition but is not magnetically ordered at any temperature. High field magnetotransport measurements show quantum oscillations, revealing small quasi-two dimensional Fermi surfaces, and it is argued that both hole and electron pockets are observed. The low-temperature Fermi surface consisting of one hole pocket and two electron pockets is also deduced from low-field magnetotransport. ARPES studies show that both hole and electron pockets undergo a significant elongation when cooling through the structural transition at ~90 K, interpreted as the result of orbital order. Measurements of the resistivity anisotropy above the structural transition are used to show that the structural distortion is electronically-driven. By combining these data sets, a complete picture of the symmetry-broken electronic structure of FeSe is constructed. The final chapter concerns another iron-based superconductor with a more complex crystal structure, the so-called ``10-3-8" phase, and in particular finds an unusual field-induced magnetic transition.
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Cassidy, Simon J. "Structure, properties, and chemistry of iron-based superconductors." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:204b8645-b80f-4a71-8399-66f86edcfd9f.

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This thesis reports the synthesis and characterisation of several layered pnictides, chalcogenides, and oxychalcogenides, with an emphasis on materials that exhibit high temperature superconductivity. High and low temperature techniques have been used to synthesise new materials and modify their properties. The majority of this work has been focused on the synthesis of superconducting materials with the general formula Ax(NH3)y(NH2)zFeSe, where A is an alkali metal. These materials are formed from a co-intercalation of alkali metals, ammonia, and alkali metal amides into the interlamellar space of pre-formed tetragonal FeSe. There is a remarkable increase in Tc associated with this intercalation, from 8 K in FeSe to a maximum of 46 K in the products. A range of characterisation techniques including neutron and X-ray diffraction, EXAFS, and SQUID magnetometry have been used to identify a variety of crystal structures, compositions, and properties adopted by these materials. The synthesis procedure of these materials where, A = Na and K, has been studied in-situ via powder X-ray diffraction at world-class central facilities, revealing new phases, intermediates, and activation energies. The Kx(NH3)y(NH2)zFeSe phases are found to undergo a topotactic decomposition step to become Kx'Fe2-y'Se2 phases on annealing, which has also been studied by in-situ powder X-ray diffraction. Additional studies on Na1-xFe2-yAs2 and CaFeSeO have been performed. Na1-xFe2-yAs2 is the product of a room temperature deintercalation of sodium and iron from NaFeAs, which changes the superconducting properties of the material. XAFS measurements have been used to characterise the local structure of the materials, which supports the conclusion that iron is deintercalated from the parent material and gives new insight into the effect of the iron vacancies on the local structure. CaFeSeO is a newly discovered material that adopts a never-before-seen crystal structure, which has been solved from powder X-ray diffraction data. Intricate vacancy ordering exists in the material, which contributes to a peculiar mixture of magnetic behaviours including signatures of a spin glass, ordered antiferromagnet, and an ordered ferromagnetic component. All of these behaviours however, can be rationalised by the nuclear and magnetic structure of the material that have been refined using powder neutron diffraction.
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Wang, Qianen, and 王乾恩. "Electronic structures of impurity and orbital-resolved vortex core states in iron-selenide superconductors." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206433.

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We study the effect of a single non-magnetic impurity and vortex core states in iron-selenide superconductors by solving the Bogoliubov-de Gennes equations self-consistently based on a three-orbital model. Various pairing symmetry are considered in the calculation. The impurity-induced in-gap bound states are found only for attractive impurity scattering potential, as in the cases of doping of Co or Ni, which is characterized by the strong particle-hole asymmetry, in the nodeless d_(x^2-y^2 ) wave pairing state. This property may be used to probe the pairing symmetry of iron-selenide 122-type superconductors. The orbital-resolved vortex core states of different pairing symmetries manifest themselves as distinguishable structures due to different behavior of the quasiparticle wavefunctions. The obtained vortices are classified by the invariant subgroups of the symmetry group of the meanfield Hamiltonian in the presence of magnetic field as isotropic s- and s±-wave vortices have G_5 symmetry for each orbital, whereas d_(x^2-y^2 ) wave vortices show G(* )¦6 symmetry for d_xzand d_yz orbitals and G(* )¦5 symmetry for d_xy orbital. In the case of d_(x^2-y^2 ) wave vortices, hybridized-pairing between d_xzand d_yz orbitals gives rise to a relative phase difference in terms of winding structures of vortices between these two orbitals and d_xy orbital, which is essentially caused by a transformation of co-representation of G(* )¦5 and G(* )¦6 subgroup. Calculation of particle densities show common charging feature of vortices in the cases of s± and d_(x^2-y^2 ) wave pairing states where the electron-like vortices are observed for d_xz and d_yz orbitals while hole-like vortices for d_xyorbital. The phase difference of orbital-resolved d_(x^2-y^2 ) wave vortices and their charging effects can be verified by further experimental observations.
published_or_final_version
Physics
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Doctor of Philosophy
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Serafin, Alessandro. "Penetration depth studies of cuprate and iron-based superconductors." Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549692.

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Using a high resolution susceptometer based on a self-resonant tunnel diode circuit, the temperature dependence of the London penetration depth λ(T) was measured in the cuprate superconductor YBa2Cu4O8 and in two iron-based superconductor materials (LaFePO,FeSe0.5 Te0.5). The first project investigated the role of CuO chains in the underdoped high- Tc cuprate YBa2CU4O8 in relation to the anisotropy observed in the in-plane components of the superfluid density [1][2]. The components of λ(T) relative to the three crystallographic axises were measured. An in-plane anisotropic response was revealed by a clear enhancement of the superfluid density along the chain direction (b-axis) at low temperature. A small DC magnetic field applied perpendicular to the CuO chain revealed a strong suppression of this extra screening current density. In terms of coupling between plane and chain bands, the result can be interpreted within a proximity-model with superconductivity induced in the intrinsically normal chains by the superconducting planes through the "proximity-effect' [3] [4] In the second project we studied the symmetry of the order parameter in iron- based superconductors. The linear T dependence of λ observed in LaFePO strongly suggested the presence of nodes in the gap function. The linearity evolved into a T2 dependence upon isovalent substitution of Y atoms on the La site supporting the conclusion of the existence of nodes where the gap changes sign. In contrast λ(T) in FeSe0.5Te0.5 followed a higher power-law T" with n=2.2±O.1. Such behaviour can be taken as evidence for strong pair breaking within a sign-changing pairing state either with or, more likely according to other experimental results (thermal conductivity in particular), without nodes. Heat-capacity measurements were also performed on this material revealing a field dependence close to the transition which resembles the high- Tc cuprates behaviour with evidences of strong thermal fluctuations. Interestingly such fluctuations appear to have unusual anisotropic effects in FeSe0.5Te0.5.
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Dioguardi, Adam Paul. "Nuclear Magnetic Resonance Studies of the 122 Iron-Based Superconductors." Thesis, University of California, Davis, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3602046.

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Extensive 75As nuclear magnetic resonance (NMR) studies were conducted on a variety of 122 iron-based superconductors. NMR frequency swept spectra and the spin-lattice relaxation rate (T1-1) were measured in CaFe2As2 as a function of temperature. The temperature dependence of the internal hyperfine field was extracted from the spectra, and T1-1 exhibits an anomalous peak attributed to the glassy freezing of domain walls associated with filamentary superconductivity. The field dependence of T1-1 and subsequent bulk resistivity and magnetization measurements also show signatures of filamentary superconductivity nucleated at antiphase domain walls. Systematic doping-dependent NMR studies were also carried out on Ni- and Co-doped BaFe2As2. In the Ni-doped variant, local magnetic inhomogeneities were observed via field swept NMR spectral analyses, and the doping dependence of the Néel temperature TN was confirmed by fits to (T1T)-1(T). Spectral wipeout and stretched exponential relaxation behavior in the Co-doped variant reveal inhomogeneous behavior and the emergence of a cluster spin glass state. The NMR measurements bring into question the details of the phase transition from coexisting antiferromagnetism and superconductivity to pure superconductivity.

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Neupane, Madhab. "Angle-Resolved Photoemission Studies on Ruthenates and Iron-Based Superconductors." Thesis, Boston College, 2010. http://hdl.handle.net/2345/1944.

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Thesis advisor: Ziqiang Wang
Angle-resloved photoemission spectroscopy (ARPES) is a powerful technique to study the electronic structure in solids. Its unique ability of resolving the energy and momentum information of electrons inside a solid provides an essential tool in measuring the electronic structure of solids. ARPES has made great contributions in the understanding of correlated system such as high-Tc superconductors and ruthenates. The Metal-insulator transition is a fundamental problem in condensed matter physics. The calcium substituted strontium ruthenate, Ca2-xSrxRuO4, provides a good platform to study the metal-insulator transition in multi-orbital systems. This system has a complex phase diagram that evolves from a p-wave superconductor to a Mott insulator. One of important projects of this thesis focuses on Ca2-xSrxRuO4 The growing evidence for coexistence of itinerant electrons and local moments in transition metals with nearly degenerate d orbitals suggests that one or more electron orbitals undergo a Mott transition while the others remain itinerant. We have observed a novel orbital selective Mott transition (OSMT) in Ca1.8Sr0.2RuO4 by ARPES. While we observed two sets of dispersing bands and Fermi surfaces (FSs) associated with the doubly-degenerate dyz and dzx orbitals, the Fermi surface associated with the dxy orbital which has a wider bandwidth is missing as a consequence of selective Mott localization. Our theoretical calculations have demonstrated that this unusual OSMT is mainly driven by the combined effects of inter-orbital carrier transfer, superlattice potentials and orbital degeneracy, whereas the bandwidth difference plays a less important role. Another important project of this thesis focuses on the recently discovered iron-pnictides superconductors. The idea of inter-FS scattering associated with the near-nesting condition has been proposed to explain the superconductivity in the pnictides. The near-nesting condition varies upon the carrier doping which shifts the chemical potential. We have performed a systematic photoemission study of the chemical potential shift as a function of doping in a pnictide system based on BaFe2As2. The experimentally determined chemical potential shift is consistent with the prediction of a rigid band shift picture by the renormalized first-principle band calculations. This leads to an electron-hole asymmetry (EHA) due to different Fermi velocities for different FS sheets, which can be calculated from the Lindhard function of susceptibility. This built-in EHA from the band structure, which is fully consistent with the experimental phase diagram, strongly supports that inter-FS scattering over the near-nesting Fermi surfaces plays a vital role in the superconductivity of the iron pnictides
Thesis (PhD) — Boston College, 2010
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Physics
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Taylor, Alice Elizabeth. "Magnetic dynamics in iron-based superconductors probed by neutron spectroscopy." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:d6be2dd2-9d8a-48fd-a290-c31dd436a972.

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This thesis describes inelastic neutron scattering (INS) experiments on several iron-based materials. The experiments were primarily designed to investigate the link between magnetic dynamics and superconductivity. The work contributes to evidence that magnetic fluctuations influence or are influenced by superconductivity. It is demonstrated that the INS response of a material, in conjunction with theoretical models, can provide valuable information about both superconductivity and magnetism. I measured the magnetically ordered parent-compound SrFe2As2 to investigate the nature of magnetism in iron-based systems. Comparison of the data to models based on both itinerant and localised magnetism showed that an itinerant model offers the best description of the data. LiFeAs is a superconductor that shows no magnetic order, however I was able to distinguish a magnetic signal in its INS spectrum. The signal is consistent with the magnetic resonance observed in several other iron-based superconductors. This indicates that LiFeAs likely hosts an s± gap symmetry. I investigated two iron-phosphide systems, LaFePO and Sr2ScO3FeP, and in this case I was unable to identify any magnetic scattering. Comparison to LiFeAs showed that any signal in LaFePO is at least 7 times weaker. These results suggest that magnetic fluctuations are not as influential to the electronic properties of iron-phosphide systems as they are in other iron-based superconductors. In CsxFe2−ySe2 I found two independent signals that appear to be related to phase-separated magnetic and superconducting regions of the sample. I showed that fluctuations associated with the magnetically ordered phase are consistent with localised magnetism, and do not respond to superconductivity. The second signal, however, increases in intensity below the superconducting transition temperature Tc = 27K, consistent with a magnetic resonance. This could be indicative of a pairing symmetry in CsxFe2−ySe2 that is distinct from most other iron-based superconductors. Finally, the molecular intercalated FeSe compound Li0.6(ND2)0.2(ND3)0.8Fe2Se2 revealed strong magnetic fluctuations. Again the signal was consistent with a magnetic resonance responding to Tc = 43 K. The results suggest that Lix(ND2)y(ND3)1−yFe2Se2 is similar to the superconducting phase of CsxFe2−ySe2, placing constraints on theoretical models to describe the molecular intercalated FeSe compounds.
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Friederichs, Gina [Verfasser], and Dirk [Akademischer Betreuer] Johrendt. "Iron-based superconductors via soft chemistry / Gina Friederichs. Betreuer: Dirk Johrendt." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1075456770/34.

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Books on the topic "Iron-based superconductors"

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Charnukha, Aliaksei. Charge Dynamics in 122 Iron-Based Superconductors. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-01192-9.

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Kenʼichirō, Hashimoto. Non-universal superconducting gap structure in iron-pnictides revealed by magnetic penetration depth measurements. Tokyo: Springer, 2012.

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service), SpringerLink (Online, ed. Magnetism and Superconductivity in Iron-based Superconductors as Probed by Nuclear Magnetic Resonance. Wiesbaden: Vieweg+Teubner Verlag, 2012.

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Hammerath, Franziska. Magnetism and Superconductivity in Iron-based Superconductors as Probed by Nuclear Magnetic Resonance. Wiesbaden: Vieweg+Teubner Verlag, 2012. http://dx.doi.org/10.1007/978-3-8348-2423-3.

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Charnukha, Aliaksei. Charge Dynamics in 122 Iron-Based Superconductors. Springer, 2016.

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Charnukha, Aliaksei. Charge Dynamics in 122 Iron-Based Superconductors. Springer, 2013.

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Book chapters on the topic "Iron-based superconductors"

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Hammerath, Franziska. "Iron-based Superconductors." In Magnetism and Superconductivity in Iron-based Superconductors as Probed by Nuclear Magnetic Resonance, 41–52. Wiesbaden: Vieweg+Teubner Verlag, 2012. http://dx.doi.org/10.1007/978-3-8348-2423-3_4.

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Lu, Xingye. "Iron-Based Superconductors." In Phase Diagram and Magnetic Excitations of BaFe2-xNixAs2: A Neutron Scattering Study, 9–27. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4998-9_2.

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Charnukha, Aliaksei. "Iron-Based Superconductors." In Charge Dynamics in 122 Iron-Based Superconductors, 13–45. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01192-9_2.

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Uchida, Shin-ichi. "Iron-Based Superconductors." In High Temperature Superconductivity, 61–85. Tokyo: Springer Japan, 2014. http://dx.doi.org/10.1007/978-4-431-55300-7_4.

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Hashimoto, Kenichiro. "Iron-Based Superconductors." In Non-Universal Superconducting Gap Structure in Iron-Pnictides Revealed by Magnetic Penetration Depth Measurements, 19–44. Tokyo: Springer Japan, 2013. http://dx.doi.org/10.1007/978-4-431-54294-0_3.

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Sharma, R. G. "Iron-Based Practical Superconductors." In Superconductivity, 313–53. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75672-7_8.

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de’ Medici, Luca. "Weak and Strong Correlations in Fe Superconductors." In Iron-Based Superconductivity, 409–41. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11254-1_11.

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Ku, Wei, Tom Berlijn, Limin Wang, and Chi-Cheng Lee. "First-Principles Studies in Fe-Based Superconductors." In Iron-Based Superconductivity, 223–53. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11254-1_7.

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Onari, Seiichiro, and Hiroshi Kontani. "Orbital+Spin Multimode Fluctuation Theory in Iron-based Superconductors." In Iron-Based Superconductivity, 331–76. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11254-1_9.

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Haindl, Silvia. "Introduction to Fe-Based Superconductors." In Iron-Based Superconducting Thin Films, 1–25. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75132-6_1.

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Conference papers on the topic "Iron-based superconductors"

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Gupta, Yuhit, Megha Goyal, and M. M. Sinha. "Phonon properties of iron-based superconductors." In 2ND INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5033053.

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BŁACHOWSKI, ARTUR, ALEKSANDRA K. JASEK, KAMILA KOMĘDERA, ANGELIKA PIERZGA, KRZYSZTOF RUEBENBAUER, and JAN ŻUKROWSKI. "MÖSSBAUER STUDIES OF IRON-BASED SUPERCONDUCTORS." In MATERIALS CHARACTERISATION 2017. Southampton UK: WIT Press, 2017. http://dx.doi.org/10.2495/mc170151.

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Belogolovskii, M., and P. Seidel. "Tunneling into multiband superconductors: The case of magnesium diboride and iron-based superconductors." In 2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW). IEEE, 2013. http://dx.doi.org/10.1109/msmw.2013.6622172.

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Nomura, Yusuke, Kazuma Nakamura, and Ryotaro Arita. "Electron–Phonon Interactions and Orbital Fluctuations in Iron-based Superconductors." In Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013). Journal of the Physical Society of Japan, 2014. http://dx.doi.org/10.7566/jpscp.3.015029.

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Takezawa, Haruka, Kouhei Sakano, Shalamujiang Simayi, Chiaki Fujii, Mitsteru Nakamura, Yoshiki Nakanishi, Yuta Koshika, Yuichiro Takahashi, Takao Watanabe, and Masahito Yoshizawa. "Elastic Properties of Iron-Based Superconductors FeTe1−xSex by Ultrasonic Measurement." In Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013). Journal of the Physical Society of Japan, 2014. http://dx.doi.org/10.7566/jpscp.3.016025.

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Torsello, Daniele, and Gianluca Ghigo. "A Coplanar Waveguide Resonator Technique for the Characterization of Iron-Based Superconductors." In 2020 IEEE Ukrainian Microwave Week (UkrMW). IEEE, 2020. http://dx.doi.org/10.1109/ukrmw49653.2020.9252603.

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Huiran Zhang, Yan Zhang, Yonghua Zhu, Yan Xu, Wenfeng Shen, Pin Wu, Min Cao, Zhenjie Feng, Qing Li, and Jincang Zhang. "Estimation of transition temperature for doped iron-based superconductors based on crystal cell structure." In The 2015 11th International Conference on Natural Computation. IEEE, 2015. http://dx.doi.org/10.1109/icnc.2015.7378075.

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Yang, Y. X., Y. Gallais, R. M. Fernandes, I. Paul, L. Chauvière, M. A. Méasson, M. Cazayous, A. Sacuto, D. Colson, and A. Forget. "Raman Scattering as a Probe of Charge Nematic Fluctuations in Iron Based Superconductors." In Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013). Journal of the Physical Society of Japan, 2014. http://dx.doi.org/10.7566/jpscp.3.015001.

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Kouchi, Takayoshi, Mitsuharu Yashima, Hidekazu Mukuda, Shigeyuki Ishida, Hiroshi Eisaki, Yoshiyuki Yoshida, Kenji Kawashima, and Akira Iyo. "75As-NMR/NQR Studies on New Iron-based 122 Superconductors (La0.5−xNa0.5+x)Fe2As2." In Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019). Journal of the Physical Society of Japan, 2020. http://dx.doi.org/10.7566/jpscp.30.011051.

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Kordyuk, Alexander A. "Complex electronic structure of iron-based superconductors as a key to high temperature superconductivity." In 2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW). IEEE, 2013. http://dx.doi.org/10.1109/msmw.2013.6622171.

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Reports on the topic "Iron-based superconductors"

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Murphy, Jason. Studies of anisotropy of iron based superconductors. Office of Scientific and Technical Information (OSTI), January 2013. http://dx.doi.org/10.2172/1116722.

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Murphy, Jason A. Studies of anisotropy of iron based superconductors. Office of Scientific and Technical Information (OSTI), January 2013. http://dx.doi.org/10.2172/1226554.

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Spina, Tiziana. Iron Based Superconductors at FNAL: Ultra High-Field Superconductor at Low-Cost. Office of Scientific and Technical Information (OSTI), January 2020. http://dx.doi.org/10.2172/1596024.

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Chubukov, Andrey V. Interplay between superconductivity and magnetism in iron-based superconductors. Office of Scientific and Technical Information (OSTI), June 2015. http://dx.doi.org/10.2172/1184024.

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Zhang, Junhua. Theory of spin-fluctuation induced superconductivity in iron-based superconductors. Office of Scientific and Technical Information (OSTI), January 2011. http://dx.doi.org/10.2172/1029610.

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Teknowijoyo, Serafim. Study of the energy gap structure in iron-based superconductors using London penetration depth and controlled artificial disorder. Office of Scientific and Technical Information (OSTI), December 2018. http://dx.doi.org/10.2172/1505179.

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