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RESEARCH PRODUCT
Magnetic Lifshitz transition and its consequences in multi-band iron-based superconductors
Konrad Jerzy KapciaAndrzej M. OleśAndrzej PtokPrzemysław PiekarzAgnieszka Cichysubject
SuperconductivityPhysicsMultidisciplinaryStrongly Correlated Electrons (cond-mat.str-el)Condensed matter physicsCondensed Matter - SuperconductivityFermi levelPhase (waves)FOS: Physical sciences02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesArticleMagnetic fieldSuperconductivity (cond-mat.supr-con)Condensed Matter - Strongly Correlated Electronssymbols.namesakeIron basedPairing0103 physical sciencessymbols010306 general physics0210 nano-technologyConstant (mathematics)Electronic band structuredescription
In this paper we address Lifshitz transition induced by applied external magnetic field in a case of iron-based superconductors, in which a difference between the Fermi level and the edges of the bands is relatively small. We introduce and investigate a two-band model with intra-band pairing in the relevant parameters regime to address a generic behaviour of a system with hole-like and electron-like bands in external magnetic field. Our results show that two Lifshitz transitions can develop in analysed systems and the first one occurs in the superconducting phase and takes place at approximately constant magnetic field. The chosen sets of the model parameters can describe characteristic band structure of iron-based superconductors and thus the obtained results can explain the experimental observations in FeSe and Co-doped BaFe$_{2}$As$_{2}$ compounds.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-02-06 | Scientific Reports |