Emergent magnetic texture in driven twisted bilayer graphene
Tipo
Artigo
Data de publicação
2020
Periódico
Nanoscale
Citações (Scopus)
18
Autores
Bahamon D.A.
Gomez-Santos G.
Stauber T.
Gomez-Santos G.
Stauber T.
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Resumo
© The Royal Society of Chemistry.The transport properties of a twisted bilayer graphene barrier are investigated for various twist angles. Remarkably, for small twist angles around the magic angle θm ∼ 1.05°, the local currents around the AA-stacked regions are strongly enhanced compared to the injected electron rate. Furthermore, the total and counterflow (magnetic) current patterns show high correlations in these regions, giving rise to well-defined magnetic moments that form a magnetic Moiré superlattice. The orientation and magnitude of these magnetic moments change as a function of the gate voltage and possible implications for emergent spin-liquid behaviour are discussed.
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Assuntos Scopus
Current patterns , Gate voltages , Injected electrons , Magic angle , Magnetic textures , Spin liquids , Twist angles , Twisted bilayers