Nuclear spin diffusion in quantum dots: Effects of inhomogeneous hyperfine interaction

被引：41
|
作者：
Deng, CX [1 ]
Hu, XD [1 ]
机构：
[1] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA
来源：
PHYSICAL REVIEW B | 2005年 / 72卷 / 16期
关键词：
D O I：
10.1103/PhysRevB.72.165333
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the effect of contact hyperfine interaction on the nuclear spin diffusion coefficients in semiconductor quantum dots. The diffusion coefficients are calculated with both the method of moment and density matrix. We show that nuclear spin diffusion is strongly suppressed by the nonuniform hyperfine coupling resulting from the confined electron wave function. Our results agree with the observed suppression of nuclear spin diffusion in these structures in recent experiments, and clarify the degree of validity of the method of moment in an inhomogeneous system.
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页数：8
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