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Nematic and chiral superconductivity induced by odd-parity fluctuations

Journal Article · · Physical Review B
 [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
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.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1411053
Alternate ID(s):
OSTI ID: 1398740
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 14 Vol. 96; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (15)

Evidence for singular-phonon-induced nematic superconductivity in a topological superconductor candidate Sr0.1Bi2Se3 journal June 2019
Direction and symmetry transition of the vector order parameter in topological superconductors CuxBi2Se3 journal January 2020
Visualizing pairing symmetry in nematic superconductors using spin-polarized spectroscopy of magnetic impurities journal October 2019
Zero Cu valence and superconductivity in high-quality C u x B i 2 S e 3 crystal journal November 2019
Superconductivity, pairing symmetry, and disorder in the doped topological insulator Sn 1 − x In x Te for x ≥ 0.10 journal January 2018
Nematic superconductivity stabilized by density wave fluctuations: Possible application to twisted bilayer graphene journal April 2019
Topological chiral superconductivity with spontaneous vortices and supercurrent in twisted bilayer graphene journal May 2019
Antichiral and nematicity-wave superconductivity journal June 2019
Electric Toroidal Quadrupoles in the Spin-Orbit-Coupled Metal Cd 2 Re 2 O 7 journal April 2019
Generalized Anderson’s theorem for superconductors derived from topological insulators journal February 2020
Nematic superconductivity stabilized by density wave fluctuations: Possible application to twisted bilayer graphene text January 2018
Antichiral and nematicity-wave superconductivity text January 2018
Topological chiral superconductivity with spontaneous vortices and supercurrent in twisted bilayer graphene text January 2018
Generalized Anderson's theorem for superconductors derived from topological insulators text January 2019
Direction and symmetry transition of the vector order parameter in topological superconductors Cu$_x$Bi$_2$Se$_3$ text January 2019

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