Spontaneous appearance of nonzero-momentum Cooper pairing : possible application to the iron-pnictides

Bibliographic description

punktacja MNiSW [2014 A]: 35

title:	Spontaneous appearance of nonzero-momentum Cooper pairing : possible application to the iron-pnictides
author:	Zegrodnik Michał, Spałek Józef
journal title:	Physical Review. B, Condensed Matter and Materials Physics
volume:	90
issue:	17
date of publication :	2014
article ID:	174507
ISSN:	1098-0121
eISSN:	1550-235X 1538-4489
DOI:	10.1103/PhysRevB.90.174507
language:	English
journal language:	English
abstract in English:	We suggest that an inhomogeneous (nonzero-momentum) paired phase can appear in the absence of an external magnetic field in a system with a predominant interband pairing and with separate Fermi-surface sheets. The Fermi wave vector mismatch which appears in such a situation can be compensated by nonzero center-of-mass momentum of the Cooper pairs, which can lead to a spontaneous appearance of the Fulde-Ferrell type of superconducting state. The idea is examined using a tight-binding model which emulates the holelike and the electronlike bands of iron-based superconductors. The state can appear for the cases of both spin-singlet and spin-triplet pairing channels.
number of pulisher's sheets:	0,5
affiliation:	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
type:	journal article
subtype:	academic paper

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