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Thomas-Fermi approximation for the quasi-two-dimensional electron gas

机译:准二维电子气的Thomas-Fermi近似

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To take into account static correlation effects in the quasi-two-dimensional electron gas a screened Coulombic interaction between particles is studied. The Thomas-Fermi approximation is used and the potential screening appears as a function of the Wigner-Seitz density parameter r(s) and the effective width t of the system. With the self-consistent field theory applied to the modified deformable jellium, the ground-state energy per particle and the conditions for electron localization are obtained in terms of the interparticle distance and the screening parameter mu. A critical minimum characteristic width t(c) is obtained; below t(c) no long-range order is obtained. For larger widths a stable localized state is predicted at finite densities. (C) 2001 John Wiley & Sons, Inc. [References: 21]
机译:为了考虑准二维电子气中的静态相关效应,研究了颗粒之间的筛选库仑相互作用。使用了Thomas-Fermi逼近,并且电位筛选显示为Wigner-Seitz密度参数r(s)和系统有效宽度t的函数。将自洽场理论应用于改性的可变形氦,根据粒子间距离和筛选参数μ,获得了每个粒子的基态能量和电子定位的条件。获得临界最小特征宽度t(c);低于t(c),则无法获得远距离顺序。对于较大的宽度,可以在有限的密度下预测稳定的局部状态。 (C)2001 John Wiley&Sons,Inc. [参考:21]

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