Bardasis-Schrieffer polaritons in excitonic insulators
Strongly Correlated Electrons
2020-07-15 v2 Mesoscale and Nanoscale Physics
Superconductivity
Abstract
Bardasis-Schrieffer modes in superconductors are fluctuations in subdominant pairing channels, e.g., d-wave fluctuations in an s-wave superconductor. This Rapid Communication shows that these modes also generically occur in excitonic insulators. In s-wave excitonic insulators, a p-wave Bardasis-Schrieffer mode exists below the gap energy, is optically active and hybridizes strongly with photons to form Bardasis-Schrieffer polaritons, which are observable in both far-field and near-field optical experiments.
Cite
@article{arxiv.2003.02997,
title = {Bardasis-Schrieffer polaritons in excitonic insulators},
author = {Zhiyuan Sun and Andrew J. Millis},
journal= {arXiv preprint arXiv:2003.02997},
year = {2020}
}
Comments
5 pages, 4 figures