Resonant spin Hall conductance in two-dimensional electron systems with a Rashba interaction in a perpendicular magnetic field.
We study transport properties of a two-dimensional electron system with Rashba spin-orbit coupling in a perpendicular magnetic field. The spin-orbit coupling competes with Zeeman splitting to introduce additional degeneracies between different Landau levels at certain magnetic fields. This degeneracy, if occurring at the Fermi level, gives rise to a resonant spin Hall conductance, whose height is divergent as 1/T and whose weight is divergent as -ln(T at low temperatures. The Hall conductance is unaffected by the Rashba coupling.
Shen
Shun-Qing
SQ
Department of Physics, The University of Hong Kong, Pukfulam Road, Hong Kong, China.
Ma
Michael
M
Xie
X C
XC
Zhang
Fu Chun
FC