Emergent magnetic texture in driven twisted bilayer graphene

被引：21

作者：

Bahamon, Dario A. ^{[1
]}

Gomez-Santos, G. ^{[2
,3
]}

Stauber, T. ^{[4
]}

机构：

[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

来源：

NANOSCALE | 2020年 / 12卷 / 28期

基金：

巴西圣保罗研究基金会;

关键词：

MOIRE BANDS;

D O I：

10.1039/d0nr02786c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：15383 / 15392

页数：10

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