Direct spin–phonon coupling of spin-flip relaxation in quantum dots  

作　　者：Ji-Wen Yin Wei-Ping Li Hong-Juan Li Yi-Fu Yu 尹辑文;李伟萍;李红娟;于毅夫(Department of Physics and Electronic Informational Engineering,Chifeng University;Department of Basic Courses,Tianjin Sino-German University of Applied Sciences)

机构地区：[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

出　　处：《Chinese Physics B》2017年第1期399-402,共4页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11264001);the Natural Science Foundation of Inner Mongolia,China(Grant No.2012MS0116)

摘　　要：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.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.

关 键 词：spin relaxation spin–phonon coupling quantum dot 

分 类 号：O471.1[理学—半导体物理]