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

Abstract

Recent experiments indicate that superconductivity in Bi 2Se 3 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. Additionally, 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. Finally, when s-wave and E u pairings have similar instability temperature, we find an intermediate phase in which both types of pairing coexist.

Authors:
 [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
OSTI Identifier:
1411053
Alternate Identifier(s):
OSTI ID: 1398740
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 14; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

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. Mon . "Nematic and chiral superconductivity induced by odd-parity fluctuations". United States. doi:10.1103/PhysRevB.96.144504. https://www.osti.gov/servlets/purl/1411053.
@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. Additionally, we show that odd-parity fluctuations in the two-component Eu representation of D3d 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 Eu pairing, and thus the latter can have a higher critical temperature. Eu pairing has two distinct phases: a nematic phase and a chiral phase, both of which can be realized in our model. Finally, when s-wave and Eu 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 = {10}
}

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    Works referencing / citing this record:

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    Evidence for singular-phonon-induced nematic superconductivity in a topological superconductor candidate Sr0.1Bi2Se3
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