Artículo
Coulomb drag in metallic twisted bilayer graphene
Fecha de publicación:
10/10/2023
Editorial:
American Physical Society
Revista:
Physical Review B
ISSN:
2469-9950
e-ISSN:
2469-9969
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Strongly correlated phases in twisted bilayer graphene (TBG) typically arise as transitions from a state in which the system behaves as a normal metal. In such a metallic regime, electron-electron interactions usually only play a subleading role in transport measurements compared with the dominant scattering mechanism. Here, we propose and theoretically study an exception to this based on a Coulomb drag setup between two metallic TBGs separated so that they only couple through many-body interactions. We find that, by solely varying the twist angle equally in both TBGs, the drag resistivity exhibits a unique maximum as the system crosses over from a degenerate to a nondegenerate regime. When the twist angles in each TBG differ, we find an anomalous drag resistivity characterized by the appearance of multiple peaks. We show that this behavior can be related to the dependence of the rectification function on the twist angle.
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Citación
Escudero, Federico Nahuel; Ardenghi, Juan Sebastian; Coulomb drag in metallic twisted bilayer graphene; American Physical Society; Physical Review B; 108; 16; 10-10-2023; 1-9
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