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arXiv 1012.5724cond-mat.mes-hall
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介观二维电子系统中反常能斯特效应的特征

Signatures of an Anomalous Nernst Effect in a Mesoscopic Two-Dimensional Electron System

Srijit Goswami, Christoph Siegert, Michael Pepper, Ian Farrer, David A. Ritchie, Arindam Ghosh

摘要:

研究了介观二维电子系统在低磁场下朗道能级量子化开始前的能斯特效应。能斯特信号的整体幅度与半经典预测吻合得很好。我们观察到可再现的介观波动的信号,随着温度的增加显着减少。我们还表明,能斯特效应表现出与振荡霍尔效应相关的反常分量。这种行为可能能够区分2DES中的不同自旋相关状态。

英文摘要:

We investigate the Nernst effect in a mesoscopic two-dimensional electron system (2DES) at low magnetic fields, before the onset of Landau level quantization. The overall magnitude of the Nernst signal agrees well with semi-classical predictions. We observe reproducible mesoscopic fluctuations in the signal which diminish significantly with an increase in temperature. We also show that the Nernst effect exhibits an anomalous component which is correlated with an oscillatory Hall effect. This behavior may be able to distinguish between different spin-correlated states in the 2DES.

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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