Dissipative transport in superlattices within the Wigner function formalism

Dissipative transport in superlattices within the Wigner function formalism
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维格纳函数形式主义中超晶格的耗散传输

DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
Irena Knezevic
Irena Knezevic
中科院分区:
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文献类型:
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作者:
O. Jonasson;Irena Knezevic

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我们采用维格纳函数方法模拟了半导体超晶格中的部分相干耗散电子输运。我们介绍了一个模型的碰撞积分的条款,描述能量耗散,动量弛豫,和空间相干性(本地化)的衰减。基于Wigner输运方程的粒子解和模型碰撞积分,我们模拟了GaAs/AlGaAs超晶格中10 K下的量子电子输运,并精确地再现了实验中得到的电流密度与场的关系.
We employ the Wigner function formalism to simulate partially coherent, dissipative electron transport in biased semiconductor superlattices. We introduce a model collision integral with terms that describe energy dissipation, momentum relaxation, and the decay of spatial coherences (localization). Based on a particle-based solution to the Wigner transport equation with the model collision integral, we simulate quantum electronic transport at 10 K in a GaAs/AlGaAs superlattice and accurately reproduce its current density vs field characteristics obtained in experiment.