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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 Moir\'e 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.

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Supplementary files

Article information


Submitted
08 Apr 2020
Accepted
20 Jun 2020
First published
22 Jun 2020

Nanoscale, 2020, Accepted Manuscript
Article type
Paper

Emergent magnetic texture in driven twisted bilayer graphene

D. A. Bahamon, G. Gómez-Santos and T. Stauber, Nanoscale, 2020, Accepted Manuscript , DOI: 10.1039/D0NR02786C

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