几何非对称性对双量子阱结构中能量和动量转移率的影响：线性区域
Geometrical Asymmetry Effect on Energy and Momentum Transfer Rates in a Double-quantum-well Structure: Linear Regime
摘要：
利用平衡方程方法研究了空间非对称性对双量子阱系统中能量和动量转移率的影响。我们的研究仅限于所施加的电场足够弱的线性区域。我们分别用无规相位近似和Hubbard近似计算了高电子密度和低电子密度情况下的屏蔽势。我们的数值计算结果预测，空间不对称性影响相当大的能量传递和阻力率的结果，在等离子体激元模式的变化。此外，我们发现，空间不对称性效应消失，在较低的温度下，包括短程相互作用。
英文摘要：
We investigate theoretically the effect of spatial asymmetry on the energy and momentum transfer rates in a double-quantum-well system using balance equation approach. Our study is limited to the linear regime where the applied electric field is sufficiently weak. We calculate the screened potential by using the random phase approximation and Hubbard approximation for the cases of high and low electron densities, respectively. Our numerical results predict that the spatial asymmetry affects considerably both the energy transfer and drag rates as a result of changes in plasmon modes. Also, we find that the spatial asymmetry effect disappears at lower temperatures by inclusion the short-range interaction.
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