Nematic and chiral superconductivity induced by odd-parity fluctuations
Journal Article
·
· Physical Review B
- 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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