Electrical band flattening, valley flux, and superconductivity in twisted trilayer graphene

Alejandro Lopez-Bezanilla, Jose Lado

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Twisted graphene multilayers have been demonstrated to yield a versatile playground to engineer controllable electronic states. Here, by combining first-principles calculations and low-energy models, we demonstrate that twisted graphene trilayers provide a tunable system where Van Hove singularities can be controlled electrically. In particular, it is shown that besides the band flattening, bulk valley currents appear, which can be quenched by local chemical dopants. We finally show that in the presence of electronic interactions, a nonuniform superfluid density emerges whose nonuniformity gives rise to spectroscopic signatures in dispersive higher-energy bands. Our results put forward twisted trilayers as a tunable van der Waals heterostructure displaying electrically controllable flat bands and bulk valley currents.
Original languageEnglish
Article number033357
Pages (from-to)1-10
Number of pages10
JournalPHYSICAL REVIEW RESEARCH
Volume2
Issue number3
DOIs
Publication statusPublished - 3 Sept 2020
MoE publication typeA1 Journal article-refereed

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  • -: Lado Jose AT-kulut

    Lado, J., Hyart, T., Kumar, P. & Koch, R.

    01/09/202031/08/2023

    Project: Academy of Finland: Other research funding

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