1. Department of Physics and Electronic Informational Engineering, Chifeng University, Chifeng 024000, China;
2. Department of Basic Courses, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China
Within the frame of the Pavlov-Firsov spin-phonon coupling model, we study the spin-flip assisted by the acoustical phonon scattering between the first-excited state and the ground state in quantum dots. We analyze the behaviors of the spin relaxation rates as a function of an external magnetic field and lateral radius of quantum dot. The different trends of the relaxation rates depending on the magnetic field and lateral radius are obtained, which may serve as a channel to distinguish the relaxation processes and thus control the spin state effectively.
Project supported by the National Natural Science Foundation of China (Grant No. 11264001) and the Natural Science Foundation of Inner Mongolia, China (Grant No. 2012MS0116).
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