Ma Shan-Shan et al 2009 Chinese Phys. Lett. 26 117201 doi:10.1088/0256-307X/26/11/117201
Ma Shan-Shan, Dou Xiu-Ming, Chang Xiu-Ying, Sun Bao-Quan, Xiong Yong-Hua, Niu Zhi-Chuan and Ni Hai-Qiao
Show affiliationsBy using polarization-resolved photoluminescence spectra, we study the electron spin relaxation in single InAs quantum dots (QDs) with the configuration of positively charged excitons X+ (one electron, two holes). The spin relaxation rate of the hot electrons increases with the increasing energy of exciting photons. For electrons localized in QDs the spin relaxation is induced by hyperfine interaction with the nuclei. A rapid decrease of polarization degree with increasing temperature suggests that the spin relaxation mechanisms are mainly changed from the hyperfine interaction with nuclei into an electron-hole exchange interaction.
Condensed matter: electrical, magnetic and optical
Issue 11 (November 2009)
Received 1 July 2009
Ma Shan-Shan et al 2009 Chinese Phys. Lett. 26 117201
Debashis Panda et al 2009 Semicond. Sci. Technol. 24 115020
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