期刊
PHYSICAL REVIEW B
卷 87, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.085425
关键词
-
资金
- CNR STM program
- EU [ITN-2008-234970 NANOCTM]
- CNR-SPIN via Seed Project [PGESE001]
- MIUR-FIRB-Futuro in Ricerca Project HybridNanoDev [RBFR1236VV]
We study an electrically controlled quantum spin Hall antidot embedded in a two-dimensional topological insulating bar. Helical edge states around the antidot and along the edges of the bar are tunnel coupled. The close connection between spin and chirality, typical of helical systems, allows to generate a spin-polarized current flowing across the bar. This current is studied as a function of the external voltages, by varying the asymmetry between the barriers. For asymmetric setups, a switching behavior of the spin current is observed as the bias is increased, both in the absence and in the presence of electron interactions. This device allows to generate and control the spin-polarized current by simple electrical means. DOI: 10.1103/PhysRevB.87.085425
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据