Jinhua Gao, Weiqiang Chen, X. C. Xie, Fu-chun Zhang
Published 2009-06-29Version 1
We study the Ruderman-Kittel-Kasuya-Yoshida (RKKY) interaction mediated by helical edge states in quantum spin hall system. The helical edge states induce an in-plane noncollinear exchange coupling between two local spins, in contrast to the isotropic coupling induced in normal metal. The angle between the two local spins in the ground state depends on the Fermi level. This property may be used to control the angle of spins by tuning the electric gate.
Comments: 4 pages, 1 figure
Journal: Phys. Rev. B 80, 241302(R) (2009)
Tunneling between edge states in a quantum spin Hall system
Finite size effects of helical edge states in HgTe/CdTe quantum wells
Effects of disorder on electron tunneling through helical edge states
![QR code for arXiv:0906.5204 [cond-mat.mes-hall]](http://oss.arxitics.com/images/favicon.svg)