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arXiv 1306.6558cond-mat.mes-hall
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非线性热电和热输运的磁场不对称性

Magnetic-field asymmetry of nonlinear thermoelectric and heat transport

Sun-Yong Hwang, David Sánchez, Minchul Lee, Rosa López

摘要:

非线性输运系数一般不服从互易关系。我们在这里讨论的磁场不对称性,出现在热电和热输运介观系统。基于弱非线性输运的散射理论,我们分析了屏蔽势对电压或温度变化的响应的主导阶对称性参数。我们将我们的一般结果应用到量子霍尔反点系统。有趣的是,我们发现,某些对称性参数显示出依赖于测量配置。

英文摘要:

Nonlinear transport coefficients do not obey, in general, reciprocity relations. We here discuss the magnetic-field asymmetries that arise in thermoelectric and heat transport of mesoscopic systems. Based on a scattering theory of weakly nonlinear transport, we analyze the leading-order symmetry parameters in terms of the screening potential response to either voltage or temperature shifts. We apply our general results to a quantum Hall antidot system. Interestingly, we find that certain symmetry parameters show a dependence on the measurement configuration.

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