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arXiv 1012.1847cond-mat.str-el
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量子霍尔区无序二维电子气的隧道谱

Tunneling Spectroscopy of Disordered Two-Dimensional Electron Gas in the Quantum Hall Regime

Gilad Barak, Amir Yacoby, Yigal Meir

摘要:

最近,Dial等人提出了在强磁场下二维电子气体的隧穿态密度的测量。几个高能量的功能出现在测量的光谱显示出明显的依赖于填充因子和独特的温度响应。我们提出了一个定量的帐户所观察到的结构,并认为这是由于排斥库仑相互作用的隧道电子和本地化的无序势阱的状态。由所施加的磁场引起的动能的淬灭导致主要由外部磁场确定并且几乎与无序势无关的电子添加谱。使用Hartree-Fock模型,我们重现了所观察到的结构的显着特征。

英文摘要:

Recently, Dial et al. presented measurements of the tunneling density of states into the bulk of a two dimensional electron gas under strong magnetic fields. Several high energy features appear in the measured spectrum showing a distinct dependence on filling factor and a unique response to temperature. We present a quantitative account of the observed structure, and argue it results from the repulsive Coulomb interactions between the tunneling electron and states localized at disorder potential wells. The quenching of the kinetic energy by the applied magnetic field leads to an electron addition spectrum that is primarily determined by the external magnetic field and is nearly independent of the disorder potential. Using a Hartree-Fock model we reproduce the salient features of the observed structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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