Chirality Probe of Twisted Bilayer Graphene in the Linear Transport Regime
Tipo
Artigo
Data de publicação
2024
Periódico
Nano Letters
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0
Autores
Bahamon D.A.
Gomez-Santos G.
Efetov D.K.
Stauber T.
Gomez-Santos G.
Efetov D.K.
Stauber T.
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Resumo
© 2024 The Authors. Published by American Chemical SocietyWe propose minimal transport experiments in the coherent regime that can probe the chirality of twisted moiré structures. We show that only with a third contact and in the presence of an in-plane magnetic field (or another time-reversal symmetry breaking effect) a chiral system may display nonreciprocal transport in the linear regime. We then propose to use the third lead as a voltage probe and show that opposite enantiomers give rise to different voltage drops on the third lead. Additionally, in the scenario of layer-discriminating contacts, the third lead can serve as a current probe capable of detecting different handedness even in the absence of a magnetic field. In a complementary configuration, applying opposite voltages on the two layers of the third lead gives rise to a chiral (super)current in the absence of a source-drain voltage whose direction is determined by its chirality.
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Bilayer Graphene , Chiral systems , In-plane magnetic fields , Quantum transport , Reciprocity relations , Symmetry breakings , Time reversal symmetries , Transport experiments , Twisted bilayer graphene , Twisted bilayers