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
收藏
页码：15383 / 15392
页数：10
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