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arXiv 1901.00895cond-mat.mes-hall
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电子-电子和电子-空穴双量子阱中的关联函数:温度、密度和势垒宽度的依赖关系

Correlation functions in electron-electron and electron-hole double quantum wells: Temperature, density and barrier-width dependence

M. W. C. Dharma-wardana, D. Neilson, F. M. Peeters

摘要:

经典映射超网链(CHNC)方案,发展处理费米子流体在强耦合和有限温度下,应用于电子-电子和电子-空穴双量子阱。线性响应理论中所需的对分布函数和局部场因子被确定为一系列的温度,载流子密度,和势垒宽度典型的实验双量子阱系统在GaAs-GaAlAs。对于电子-空穴双量子阱,发现在小的载流子间距的对分布函数的一个大的增强。电子-空穴系统的CHNC方程在低密度下不再成立,在低密度下会形成束缚态。

英文摘要:

The classical-map hyper-netted-chain (CHNC) scheme, developed for treating fermion fluids at strong coupling and at finite temperatures, is applied to electron-electron and electron-hole double quantum wells. The pair distribution functions and the local field factors needed in linear response theory are determined for a range of temperatures, carrier densities, and barrier widths typical for experimental double quantum well systems in GaAs-GaAlAs. For electron-hole double quantum wells, a large enhancement in the pair distribution functions is found for small carrier separations. The CHNC equations for electron-hole systems no longer hold at low densities where bound-state formation occurs.

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