Behavior of localized states in double twisted ABC trilayer graphene
We show that a double-twisted ABC trilayer graphene, formed by stacking two ABC trilayers with a rotation angle between them, is a semiconductor with a gap of about 30 meV. Importantly, flat bands in the electronic structure are observed even for large angles, and the localization of electrons follo...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/156555 |
| Acceso en línea: | https://hdl.handle.net/11441/156555 https://doi.org/10.1016/j.carbon.2024.118952 |
| Access Level: | acceso abierto |
| Palabra clave: | Graphene Trilayers Twistronic Localized states |
| Sumario: | We show that a double-twisted ABC trilayer graphene, formed by stacking two ABC trilayers with a rotation angle between them, is a semiconductor with a gap of about 30 meV. Importantly, flat bands in the electronic structure are observed even for large angles, and the localization of electrons follows the same pattern as in ABC trilayer graphene. Our first-principles calculations show that this behavior holds at least for rotation angles from 7 to 21 degrees. We further study the charge redistribution as a function of the angle. Below two degrees, the charge escapes from the rotated layers and AA zones, moving to the outer layers. This behavior is general for any ABA trilayer with one of the outer layers twisted (ABT). Our findings shed light on some peculiarities of rotated graphene, explaining the absence of a superconductivity phase on these double-trilayer and ABT systems. |
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