Emergent magnetic texture in driven twisted bilayer graphene

Autor(es)

Bahamon, Dario A. ^[1] ; Gomez-Santos, G. ^{[2, 3]} ; Stauber, T. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Prebiteriana Mackenzie, MackGraphe Gmphene & Nanomat Res Ctr, Rua Consolacao 896, BR-01302907 Sao Paulo, SP - Brazil

^[2] Univ Autonoma Madrid, Inst Nicolas Cabrera, Dept Fis Mat Condensada, E-28049 Madrid - Spain

^[3] Univ Autonoma Madrid, Condensed Matter Phys Ctr IFIMAC, E-28049 Madrid - Spain

^[4] CSIC, Inst Ciencias Mat Madrid, Dept Teoria & Simulac Mat, E-28049 Madrid - Spain

• Tipo de documento: Artigo Científico
• Fonte: NANOSCALE; v. 12, n. 28, p. 15383-15392, JUL 28 2020.
• Citações Web of Science: 6

Resumo

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)similar to 1.05 degrees, 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 Moire 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. (AU)

• Processo FAPESP: 15/11779-4 - Efeitos plasmônicos e não-lineares em grafeno acoplado a guias de onda ópticos
• Beneficiário: Christiano José Santiago de Matos
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/07276-5 - Biodetecção plasmônica no infra-vermelho médio e longínquo usando grafeno
• Beneficiário: Christiano José Santiago de Matos
• Modalidade de apoio: Auxílio à Pesquisa - Regular