Projekteja vuodessa
Abstrakti
Quasi-flat-bands emerging in buckled monolayer graphene superlattices have been recently shown to realize correlated states analogous to those observed in twisted graphene multilayers. Here, we demonstrate the emergence of valley topology driven by competing electronic correlations in buckled graphene superlattices. We show, both by means of atomistic models and a low-energy description, that the existence of long-range electronic correlations leads to a competition between antiferromagnetic and charge density wave instabilities, that can be controlled by means of screening engineering. Interestingly, we find that the emergent charge density wave has a topologically non-trivial electronic structure, leading to a coexistent quantum valley Hall insulating state. In a similar fashion, the antiferromagnetic phase realizes a spin-polarized quantum valley-Hall insulating state. Our results put forward buckled graphene superlattices as a new platform to realize interaction-induced topological matter.
Alkuperäiskieli | Englanti |
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Artikkeli | 035057 |
Sivumäärä | 7 |
Julkaisu | 2D Materials |
Vuosikerta | 8 |
Numero | 3 |
DOI - pysyväislinkit | |
Tila | Julkaistu - heinäk. 2021 |
OKM-julkaisutyyppi | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä |
Sormenjälki
Sukella tutkimusaiheisiin 'Correlation-induced valley topology in buckled graphene superlattices'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.Tietoaineistot
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Correlation-induced valley topology in buckled graphene superlattices
Manesco, A. L. R. (Creator) & Lado, J. L. (Creator), Zenodo, 2021
DOI - pysyväislinkki: 10.5281/zenodo.4685132, https://doi.org/10.5281/zenodo.4685133
Tietoaineisto: Dataset
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Lado Jose AT-palkka: Engineering fractional quantum matter in twisted van der Waals materials
Lado, J. (Vastuullinen tutkija)
01/09/2020 → 31/08/2025
Projekti: RCF Academy Research Fellow (new)
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Lado Jose AT-kulut: Engineering fractional quantum matter in twisted van der Waals materials
Lado, J. (Vastuullinen tutkija)
01/09/2020 → 31/08/2023
Projekti: RCF Academy Research Fellow: Research costs