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  Magnetic Lifshitz transition and its consequences in multi-band iron-based superconductors

Ptok, A., Kapcia, K., Cichy, A., Oleś, A., & Piekarz, P. (2017). Magnetic Lifshitz transition and its consequences in multi-band iron-based superconductors. Scientific Reports, 7: 41979.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000E-D112-1 Version Permalink: https://hdl.handle.net/21.11116/0000-000E-D113-0
Genre: Journal Article

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Ptok, A., Author
Kapcia, K., Author
Cichy, A., Author
Oleś, A.1, Author
Piekarz, P., Author
Affiliations:
1Max Planck Society, ou_persistent13              

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 Abstract: 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 BaFe2As2 compounds.

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Language(s): eng - English
 Dates: 2017
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 734852
ISI: 000393427000001
 Degree: -

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Title: Scientific Reports
Source Genre: Journal
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Publ. Info: LONDON : NATURE PUBLISHING GROUP
Pages: - Volume / Issue: 7 Sequence Number: 41979 Start / End Page: - Identifier: ISSN: 2045-2322