Emergent magnetic texture in driven twisted bilayer graphene

Abstract

The transport properties of a twisted bilayer graphene barrier are investigated for various twist angles. Remarkably, for small twist angles around the magic angle ${\theta }_m\sim 1.05^{\circ }$, 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, given rise to well-defined magnetic moments that form a magnetic Moiré superlattice. The orientation and magnitude of these magnetic moments changes as function of the gate voltage and possible implications for emergent spin-liquid behaviour are discussed.

arXiv comment18 pages, 20 figures

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• Plasmon-enhanced near-field chirality in twisted van der Waals heterostructures
• Chirality-induced spin texture switching in twisted bilayer graphene
• Change of chirality at magic angles of twisted bilayer graphene
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• Efficient Chebyshev polynomial approach to quantum conductance calculations: Application to twisted bilayer graphene
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• The fate of disorder in twisted bilayer graphene near the magic angle
• Interlayer electric multipole Hall effect in twisted multilayers