Magnetic Lifshitz transition and its consequences in multi-band iron-based superconductors
arXiv:1702.02612 · doi:10.1038/srep41979
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 BaFeAs compounds.
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References in corpus (14)
- Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
- Field-induced superconducting phase of FeSe in the BCS-BEC cross-over
- Iron based superconductors: magnetism, superconductivity and electronic structure
- Lifshitz critical point in the cuprate superconductor YBa2Cu3Oy from high-field Hall effect measurements
- Tuning of heteronuclear interactions in a quantum-degenerate Fermi-Bose mixture
- Universality of superconducting gaps in overdoped Ba0.3K0.7Fe2As2 observed by angle-resolved photoemission spectroscopy
- Abrupt change in the energy gap of superconducting Ba1-xKxFe2As2 single crystals with hole doping
- Competing Pairing Symmetries in a Generalized Two-Orbital Model for the Pnictides
- Metamagnetism and Lifshitz Transitions in Models for Heavy Fermions
- Fermi surface of CeIn3 above the Neel critical field
- Two-band superfluidity from the BCS to the BEC limit
- Crossover in the magnetic response of single-crystalline BaKFeAs and Lifshitz critical point evidenced by Hall effect measurements
- GPU-based acceleration of free energy calculations in solid state physics
- Magnetic field-induced gapless state in multiband superconductors