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

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Andrzej Ptok ◽  
Konrad J. Kapcia ◽  
Agnieszka Cichy ◽  
Andrzej M. Oleś ◽  
Przemysław Piekarz
Keyword(s):  
Iron Based Superconductors ◽  
Lifshitz Transition ◽  
Iron Based ◽  
Multi Band

scholarly journals Effects of Pair-Hopping Coupling on Properties of Multi-Band Iron-Based Superconductors

2020 ◽  
Vol 8 ◽  
Author(s):  
Andrzej Ptok ◽  
Konrad Jerzy Kapcia ◽  
Przemysław Piekarz
Keyword(s):  
Iron Based Superconductors ◽  
Iron Based ◽  
Pair Hopping ◽  
Multi Band

scholarly journals Non-local dxy nematicity and the missing electron pocket in FeSe

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Luke C. Rhodes ◽  
Jakob Böker ◽  
Marvin A. Müller ◽  
Matthias Eschrig ◽  
Ilya M. Eremin
Keyword(s):  
Experimental Data ◽  
Superconducting Gap ◽  
Momentum Dependence ◽  
Natural Explanation ◽  
Iron Based Superconductors ◽  
Nematic Ordering ◽  
Lifshitz Transition ◽  
Non Local ◽  
Iron Based ◽  
Electron Pocket

AbstractThe origin of spontaneous electronic nematic ordering provides important information for understanding iron-based superconductors. Here, we analyze a scenario where the dxy orbital strongly contributes to nematic ordering in FeSe. We show that the addition of dxy nematicity to a pure dxz/dyz order provides a natural explanation for the unusual Fermi surface and correctly reproduces the strongly anisotropic momentum dependence of the superconducting gap. We predict a Lifshitz transition of an electron pocket mediated by temperature and sulfur doping, whose signatures we discuss by analysing available experimental data. We present the variation of momentum dependence of the superconducting gap upon suppression of nematicity. Our quantitatively accurate model yields the transition from tetragonal to nematic FeSe and the FeSe1−xSx series, and puts strong constraints on possible nematic mechanisms.

Isotope Effect in Multi-Band and Multi-Channel Attractive Systems and Inverse Isotope Effect in Iron-Based Superconductors

2009 ◽  
Vol 78 (9) ◽  
pp. 094718 ◽  
Author(s):  
Takashi Yanagisawa ◽  
Kosuke Odagiri ◽  
Izumi Hase ◽  
Kunihiko Yamaji ◽  
Parasharam M. Shirage ◽  
...  
Keyword(s):  
Isotope Effect ◽  
Iron Based Superconductors ◽  
Iron Based ◽  
Inverse Isotope Effect ◽  
Multi Band

scholarly journals Reply to “Comment on `Isotope Effect in Multi-Band and Multi-Channel Attractive Systems and Inverse Isotope Effect in Iron-Based Superconductors”'

2010 ◽  
Vol 79 (12) ◽  
pp. 126002 ◽  
Author(s):  
Takashi Yanagisawa ◽  
Kosuke Odagiri ◽  
Izumi Hase ◽  
Kunihiko Yamaji ◽  
Parasharam M. Shirage ◽  
...  
Keyword(s):  
Isotope Effect ◽  
Iron Based Superconductors ◽  
Iron Based ◽  
Inverse Isotope Effect ◽  
Multi Band
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