Quantum Hall Effect, Screening, and Layer-Polarized Insulating States in Twisted Bilayer Graphene
نویسندگان
چکیده
منابع مشابه
Quantum Hall effect, screening, and layer-polarized insulating states in twisted bilayer graphene.
We investigate electronic transport in dual-gated twisted-bilayer graphene. Despite the subnanometer proximity between the layers, we identify independent contributions to the magnetoresistance from the graphene Landau level spectrum of each layer. We demonstrate that the filling factor of each layer can be independently controlled via the dual gates, which we use to induce Landau level crossin...
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Twisted bilayer graphene offers a unique bilayer two-dimensional-electron system where the layer separation is only in sub-nanometer scale. Unlike Bernal-stacked bilayer, the layer degree of freedom is disentangled from spin and valley, providing eight-fold degeneracy in the low energy states. We have investigated broken-symmetry quantum Hall (QH) states and their transitions due to the interpl...
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Tomas Löfwander,1 Pablo San-Jose,2 and Elsa Prada3 1Department of Microtechnology and Nanoscience MC2, Chalmers University of Technology, SE-412 96 Göteborg, Sweden 2Instituto de Estructura de la Materia (IEM-CSIC), Serrano 123, 28006 Madrid, Spain 3Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain (Received 3 December 2012; revised manuscript received 3 May 2...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2012
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.108.076601