标题： 无序二维电子气中的低温热电输运 显示英文标题

标题： Low-temperature thermoelectric transport in the disordered two-dimensional electron gas

摘要： 我们研究了二维无序电子气中长程库仑相互作用下热电输运系数$\alpha$和热功当量$S$的相互作用修正。为此，我们利用最近推导出的具有粒子-空穴不对称性的广义非线性sigma模型，分析了热密度-密度关联函数。我们详细介绍了关联函数的微扰计算、其结构的分析以及输运系数最终结果的推导过程。 我们证明，在扩散输运区域$T\ll 1/\tau$中，实部过程和虚部过程都导致$\alpha$和$S$出现对数形式的相互作用修正，其中$\delta \alpha/\alpha<0$和$\delta S/S<0$起作用，$T$为温度，$1/\tau$为无序散射率。 我们在一封附信中简要介绍了我们的发现。 显示英文摘要

摘要： We study interaction corrections to the thermoelectric transport coefficient $\alpha$ and the thermopower $S$ in the two-dimensional disordered electron gas with long-range Coulomb interactions. To this end, we analyze the heat density-density correlation function using the recently derived generalized non-linear sigma model with particle-hole asymmetry. We present a detailed account of the perturbative calculation of the correlation function, the analysis of its structure, and the derivation of the final results for the transport coefficients. We show that both real and virtual processes give rise to logarithmic interaction corrections to $\alpha$ and $S$ with $\delta \alpha/\alpha<0$ and $\delta S/S<0$ in the diffusive transport regime $T\ll 1/\tau$, where $T$ is the temperature and $1/\tau$ is the disorder scattering rate. A short account of our findings is presented in an accompanying letter.