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Title: Nematic and chiral superconductivity induced by odd-parity fluctuations

Abstract

Recent experiments indicate that superconductivity in Bi2Se3 intercalated with Cu, Nb, or Sr is nematic with rotational symmetry breaking. Motivated by this observation, we present a model study of nematic and chiral superconductivity induced by odd-parity fluctuations. We show that odd-parity fluctuations in the two-component E-u representation of D-3d crystal point group can generate attractive interaction in both the even-parity s-wave and odd-parity E-u pairing channels, but repulsive interaction in other odd-parity pairing channels. Coulomb repulsion can suppress s-wave pairing relative to E-u pairing, and thus the latter can have a higher critical temperature. E-u pairing has two distinct phases: a nematic phase and a chiral phase, both of which can be realized in our model. When s-wave and E-u pairings have similar instability temperature, we find an intermediate phase in which both types of pairing coexist.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
OSTI Identifier:
1411053
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B; Journal Volume: 96; Journal Issue: 14
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wu, Fengcheng, and Martin, Ivar. Nematic and chiral superconductivity induced by odd-parity fluctuations. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.144504.
Wu, Fengcheng, & Martin, Ivar. Nematic and chiral superconductivity induced by odd-parity fluctuations. United States. doi:10.1103/PhysRevB.96.144504.
Wu, Fengcheng, and Martin, Ivar. 2017. "Nematic and chiral superconductivity induced by odd-parity fluctuations". United States. doi:10.1103/PhysRevB.96.144504.
@article{osti_1411053,
title = {Nematic and chiral superconductivity induced by odd-parity fluctuations},
author = {Wu, Fengcheng and Martin, Ivar},
abstractNote = {Recent experiments indicate that superconductivity in Bi2Se3 intercalated with Cu, Nb, or Sr is nematic with rotational symmetry breaking. Motivated by this observation, we present a model study of nematic and chiral superconductivity induced by odd-parity fluctuations. We show that odd-parity fluctuations in the two-component E-u representation of D-3d crystal point group can generate attractive interaction in both the even-parity s-wave and odd-parity E-u pairing channels, but repulsive interaction in other odd-parity pairing channels. Coulomb repulsion can suppress s-wave pairing relative to E-u pairing, and thus the latter can have a higher critical temperature. E-u pairing has two distinct phases: a nematic phase and a chiral phase, both of which can be realized in our model. When s-wave and E-u pairings have similar instability temperature, we find an intermediate phase in which both types of pairing coexist.},
doi = {10.1103/PhysRevB.96.144504},
journal = {Physical Review B},
number = 14,
volume = 96,
place = {United States},
year = 2017,
month =
}