Oscillatory spin relaxation rates in quantum dots

被引：30
作者：
Destefani, CF
Ulloa, SE
机构：
[1] Ohio Univ, Dept Phys & Astron & Nanoscale, Athens, OH 45701 USA
[2] Ohio Univ, Quantum Phenomena Inst, Athens, OH 45701 USA
来源：
PHYSICAL REVIEW B | 2005年 / 72卷 / 11期
关键词：
D O I：
10.1103/PhysRevB.72.115326
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Phonon-induced spin relaxation rates in quantum dots are studied as function of in-plane and perpendicular magnetic fields, temperature, and electric field, for different dot sizes. We consider Rashba and Dresselhaus spin-orbit mixing in different materials and show how Zeeman sublevels can relax via piezoelectric and deformation potential coupling to acoustic phonons. We find that strong lateral and vertical confinements may induce minima in the rates at particular values of the magnetic field, where spin relaxation times can reach even seconds. We obtain good agreement with experimental findings in GaAs quantum dots.
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页数：6
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