Speaker
Étienne Lantagne-Hurtubise
(Université de Sherbrooke)
Description
In superconductors with multiple pairing channels, collective excitations known as "clapping modes" can arise in channels whose angular momenta differ from that of the pair condensate. Crystal symmetries often impose selection rules which keep these modes optically dark. We show that if pairing occurs around a single Fermi surface, trigonal warping renders clapping modes visible in the longitudinal and Hall optical responses. Our results suggest that rhombohedral graphene multilayers, which are believed to host the required ingredients, might offer an ideal setting for the study of exotic superconducting collective modes.
| Keyword-1 | Rhombohedral graphene |
|---|---|
| Keyword-2 | Superconductivity |
| Keyword-3 | Collective modes |
Authors
Dr
Benjamin Levitan
(Université de Sherbrooke)
Étienne Lantagne-Hurtubise
(Université de Sherbrooke)