title: Temperature dependence of spin photocurrent spectra induced by Rashba- and Dresselhaus-type circular photogalvanic effect at inter-band excitation in InGaAs/AlGaAs quantum wells.
abstract: Spin photocurrent spectra induced by Rashba- and Dresselhaus-type circular photogalvanic effect (CPGE) at inter-band excitation have been experimentally investigated in InGaAs/AlGaAs quantum wells at a temperature range of 80 to 290 K. It is found that, the sign of Rashba-type current reverses at low temperatures, while that of Dresselhaus-type remains unchanged. The temperature dependence of ratio of Rashba and Dresselhaus spin-orbit coupling parameters, increasing from -6.7 to 17.9, is obtained, and the possible reasons are discussed. We also develop a model to extract the Rashba-type effective electric field at different temperatures. It is demonstrated that excitonic effect will significantly influence the Rashba-type CPGE, while it has little effect on Dresselhaus-type CPGE.
authors.forename: Jinling
authors.initials: J
authors.lastname: Yu
authors.forename: Shuying
authors.initials: S
authors.lastname: Cheng
authors.forename: Yunfeng
authors.initials: Y
authors.lastname: Lai
authors.forename: Qiao
authors.initials: Q
authors.lastname: Zheng
authors.forename: Laipan
authors.initials: L
authors.lastname: Zhu
authors.forename: Yonghai
authors.initials: Y
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Ren