skip to main content

DOE PAGESDOE PAGES

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

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:
Grant/Contract Number:
AC02-06CH11357
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)
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
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE
OSTI Identifier:
1411053
Alternate Identifier(s):
OSTI ID: 1398740

Wu, Fengcheng, and Martin, Ivar. Nematic and chiral superconductivity induced by odd-parity fluctuations. United States: N. p., 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. 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}
}

Works referenced in this record:

Topological field theory of time-reversal invariant insulators
journal, November 2008
  • Qi, Xiao-Liang; Hughes, Taylor L.; Zhang, Shou-Cheng
  • Physical Review B, Vol. 78, Issue 19, Article No. 195424
  • DOI: 10.1103/PhysRevB.78.195424

Z2 Topological Order and the Quantum Spin Hall Effect
journal, September 2005

Colloquium: Topological insulators
journal, November 2010

Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface
journal, May 2009
  • Zhang, Haijun; Liu, Chao-Xing; Qi, Xiao-Liang
  • Nature Physics, Vol. 5, Issue 6, p. 438-442
  • DOI: 10.1038/nphys1270

Topological Insulators in Three Dimensions
journal, March 2007