纳米尺度导体中的热不对称性：退相干和非弹性的作用
Heat asymmetries in nanoscale conductors: The role of decoherence and inelasticity
摘要：
本文研究了存在非弹性散射时，相干导体中不同终端之间的热流。我们用一个双端量子点来说明我们的理论。两种类型的热不对称性进行了研究：电不对称性$Δ_E$，它描述了在一个给定的接触时，电压交换的热流偏差，和接触不对称性$Δ_C$，它量化了在两个不同的电极测量的功率之间的差异。在线性制度，这两个不对称性同意，并成比例的塞贝克系数，后者在低温下的Mott型公式与点传输重整非弹性。有趣的是，在非线性制度的运输，我们发现$Δ_E\neqΔ_C$和这种不对称偏离依赖于所施加的偏置配置。我们的结果可能对Lee等人最近的实验很重要[Nature（London）498，209（2013）]，其中测量了这些不对称性。
英文摘要：
We investigate the heat flow between different terminals in an interacting coherent conductor when inelastic scattering is present. We illustrate our theory with a two-terminal quantum dot setup. Two types of heat asymmetries are investigated: electric asymmetry $Δ_E$, which describes deviations of the heat current in a given contact when voltages are exchanged, and contact asymmetry $Δ_C$, which quantifies the difference between the power measured in two distinct electrodes. In the linear regime, both asymmetries agree and are proportional to the Seebeck coefficient, the latter following at low temperature a Mott-type formula with a dot transmission renormalized by inelasticity. Interestingly, in the nonlinear regime of transport we find $Δ_E\neqΔ_C$ and this asymmetry departure depends on the applied bias configuration. Our results may be important for the recent experiments by Lee et al. [Nature (London) 498, 209 (2013)], where these asymmetries were measured.
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