Topological Superconductivity in Twisted Multilayer Graphene.
Phys Rev Lett
; 121(8): 087001, 2018 Aug 24.
Article
en En
| MEDLINE
| ID: mdl-30192621
ABSTRACT
We study a minimal Hubbard model for electronically driven superconductivity in a correlated flat miniband resulting from the superlattice modulation of a twisted graphene multilayer. The valley degree of freedom drastically modifies the nature of the preferred pairing states, favoring spin triplet d+id order with a valley singlet structure. We identify two candidates in this class, which are both topological superconductors. These states support half-vortices carrying half the usual superconducting flux quantum hc/(4e), and have topologically protected gapless edge states.
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MEDLINE
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En
Revista:
Phys Rev Lett
Año:
2018
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Article
País de afiliación:
Estados Unidos