Two-dimensional electron density of states in a transverse magnetic field
Two-dimensional electron density of states in a transverse magnetic field
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横向磁场中的二维电子态密度
DOI：
10.1070/pu1988v031n06abeh003562
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发表时间：
1988
期刊：
影响因子：
2.7
通讯作者：
V. Timofeev
中科院分区：
文献类型：
--
作者：
I. Kukushkin;S. Meshkov;V. Timofeev
本文综述了目前研究磁场中二维电子态密度的理论概念和实验方法。作者讨论了决定真实的系统态密度能量分布的不同因素。他们证明了由二维电子，特别是振荡依赖于筛选电子浓度的随机外部电位波动的筛选的重要性。在考虑各种理论方法和实验方法时，作者分析了它们的适用条件和所得结果的自洽性。结果表明，从朗道能级加宽的振荡中，可以用实验方法估计随机势的振幅和范围。
This review covers the current theoretical concepts and experimental methods employed in studying the two-dimensional electron density of states in a magnetic field. The authors discuss the different factors that determine the energy distribution of the density of states in real systems. They demonstrate the importance of the screening of random external potential fluctuations by two-dimensional electrons and particularly the oscillatory dependence of screening on electron concentration. When considering the various theoretical approaches and experimental methods, the authors analyze their conditions of applicability and the self-consistency of obtained results. They demonstrate that it is possible to evaluate experimentally the random potential amplitude and range from the oscillations in Landau level broadening.