Spin-triplet superconductivity from excitonic effect in doped insulators.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35320044.
- Also identified by DOI 10.1073/pnas.2117735119 and PMC identifier 9060479.
- Licence recorded as CC BY-NC-ND.
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Abstract
SignificanceWe 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<sub>2</sub>.