Spin-triplet superconductivity from excitonic effect in doped insulators
Name
pnas.2117735119.pdf
Description
Published version
Size
1.81 MB
Format
Adobe PDF
Checksum (MD5)
a7cbb08ce3e656e422ed7b82520a01d3
Author(s)
Crépel, Valentin
Fu, Liang
Date Issued
March 29, 2022
Journal
Proceedings of the National Academy of Sciences
Publisher
Proceedings of the National Academy of Sciences
Citation
Crépel, Valentin and Fu, Liang. 2022. "Spin-triplet superconductivity from excitonic effect in doped insulators." Proceedings of the National Academy of Sciences, 119 (13).
Version
Final published version
Abstract
Significance
We present a mechanism for unconventional superconductivity in doped band insulators, where short-ranged pairing interaction arises from Coulomb repulsion due to virtual interband or excitonic processes. Remarkably, electron pairing is found upon infinitesimal doping, giving rise to Bose–Einstein condensate (BEC)–Bardeen–Cooper–Schrieffer (BCS) crossover at low density. Our theory explains puzzling behaviors of superconductivity and predicts spin-triplet pairing in electron-doped ZrNCl and WTe 2 .
We present a mechanism for unconventional superconductivity in doped band insulators, where short-ranged pairing interaction arises from Coulomb repulsion due to virtual interband or excitonic processes. Remarkably, electron pairing is found upon infinitesimal doping, giving rise to Bose–Einstein condensate (BEC)–Bardeen–Cooper–Schrieffer (BCS) crossover at low density. Our theory explains puzzling behaviors of superconductivity and predicts spin-triplet pairing in electron-doped ZrNCl and WTe 2 .
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1073/pnas.2117735119
