Charged skyrmions and topological origin of superconductivity in magic-angle graphene.
Journal
Science advances
ISSN: 2375-2548
Titre abrégé: Sci Adv
Pays: United States
ID NLM: 101653440
Informations de publication
Date de publication:
May 2021
May 2021
Historique:
received:
02
11
2020
accepted:
15
03
2021
entrez:
6
5
2021
pubmed:
7
5
2021
medline:
7
5
2021
Statut:
epublish
Résumé
Topological solitons, a class of stable nonlinear excitations, appear in diverse domains as in the Skyrme model of nuclear forces. Here, we argue that similar excitations play an important role in a remarkable material obtained on stacking and twisting two sheets of graphene. Close to a magic twist angle, insulating behavior is observed, which gives way to superconductivity on doping. Here, we propose a unifying description of both observations. A symmetry breaking condensate leads to the ordered insulator, while topological solitons in the condensate-skyrmions-are shown to be charge 2
Identifiants
pubmed: 33952523
pii: 7/19/eabf5299
doi: 10.1126/sciadv.abf5299
pmc: PMC8099185
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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