The ab initio study of unconventional superconductivity in CeCoIn\(_{5}\) and FeSe

Electronic structure and the shape of the Fermi surface are known to be of fundamental importance for the superconducting instability in real materials. We demonstrate that such an instability may be explored by static Cooper pair susceptibility renormalized by pairing interaction and present an eff...

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Bibliographic Details
Published inarXiv.org
Main Authors Ptok, Andrzej, Kapcia, Konrad J, Piekarz, Przemysław, Oleś, Andrzej M
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 05.10.2017
Subjects
Electronic structure
Fermi surfaces
Fermions
Magnetic permeability
Physics - Computational Physics
Physics - Materials Science
Physics - Strongly Correlated Electrons
Physics - Superconductivity
Quantum theory
Unconventional superconductivity
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Summary:Electronic structure and the shape of the Fermi surface are known to be of fundamental importance for the superconducting instability in real materials. We demonstrate that such an instability may be explored by static Cooper pair susceptibility renormalized by pairing interaction and present an efficient method of its evaluation using Wannier orbitals derived from ab initio calculation. As an example, this approach is used to search for an unconventional superconducting phase of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) type in a heavy-fermion compound CeCoIn\(_5\) and an iron-based superconductor FeSe. The results suggest that the FFLO superconducting phase occurs at finite magnetic field in both materials.
ISSN:2331-8422
DOI:10.48550/arxiv.1710.01988