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中国物理学会期刊

CaAs中光生重空穴的空穴—空穴散射

CSTR: 32037.14.aps.49.1171

HOLE-HOLE SCATTERING OF PHOTOEXCITED HEAVY-HOLES IN GaAs

CSTR: 32037.14.aps.49.1171
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  • 讨论了高斯型载流子分布的静态屏蔽效应及其对空穴—空穴散射率的影响,说明随着空穴初始动能的减小,载流子分布的静态屏蔽效应和散射前后空穴波函数的重叠积分导致散射率迅速减小.重叠积分对空穴—空穴散射率带来的修正因子的下限约为03,上限为1,均大于先前报道的修正因子01.理论计算与实验测量结果符合.

     

    The heavy-hole—heavy-hole scattering in GaAs has been investigated by taking into account the static screening of the excited carrier Gaussian distribution. It has been shown that the scattering rate decreases strongly with the decrease of the initial energy of heavy holes. This can be attributed to the effects of static screening and the overlap of the |p〉 like wave functions of excited carriers. The overlap of the |p〉 like wave functions reduces the scattering rate by a factor of 3 for the low heavy-hole energy. The theoretical predictions are in good agreement with the experimental results.

     

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