Temperature dependence of the intrinsic spin Hall effect in Rashba spin-orbit coupled systemsZhou Li1, Zhongshui Ma1 and Chao Zhang2
1 School of Physics, Peking University - Beijing 100871, China
2 School of Engineering Physics, University of Wollongong - New South Wales 2552, Australia
received 26 February 2008; accepted in final form 29 April 2008; published June 2008
published online 3 June 2008
We investigate the temperature dependence of the intrinsic charge and spin transport in two-dimensional semiconductors with Rashba spin-orbit coupling. For 2 kF0-2m2/2 < < 2 kF0+2m2/2 (where is the Rashba spin-orbit coupling parameter), the real part of the optical conductivity (R()) and the imaginary part of the spin Hall conductivity (IsH()) decrease with temperature monotonically. Outside this frequency range, R() and IsH() exhibit resonant behavior. At high frequencies, RsH() changes sign at a characteristic temperature T1. Our result suggests that the sign and magnitude of RsH() can be tuned by changing the temperature.
71.10.Ca - Electron gas, Fermi gas.
72.25.-b - Spin polarized transport.
73.23.-b - Electronic transport in mesoscopic systems.
© EPLA 2008