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arXiv 0810.0960cond-mat.mes-hallcond-mat.str-el
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量子线中的零偏压反常

On the Zero-Bias Anomaly in Quantum Wires

S. Sarkozy, F. Sfigakis, K. Das Gupta, I. Farrer, D. A. Ritchie, G. A. C. Jones, M. Pepper

摘要:

未掺杂的GaAs/AlGaAs异质结构已被用于制造量子线,其中平均杂质分离大于器件尺寸。我们比较的零偏置异常的行为对近藤和自旋极化模型的预测。这两种理论都有不足之处,其中最引人注目的是在固定磁场B下零偏置反常自旋分裂与电子密度的线性关系,以及在夹断时塞曼效应的抑制。

英文摘要:

Undoped GaAs/AlGaAs heterostructures have been used to fabricate quantum wires in which the average impurity separation is greater than the device size. We compare the behavior of the Zero-Bias Anomaly against predictions from Kondo and spin polarization models. Both theories display shortcomings, the most dramatic of which are the linear electron-density dependence of the Zero-Bias Anomaly spin-splitting at fixed magnetic field B and the suppression of the Zeeman effect at pinch-off.

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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