标题： 无序二维电子系统中电荷输运和热电响应的标度理论：从弱到强局域化 显示英文标题

标题： Scaling theory of charge transport and thermoelectric response in disordered 2D electron systems: From weak to strong localization

摘要： 我们为展示从弱局域化（WL）到强局域化（SL）转变的二维无序系统中的电荷输运和热电响应，开发了一种新的理论方案。 该方案基于结合了安德森局域化标度理论与 Kubo-Luttinger 理论的标度理论。 该方案的关键方面包括引入一个统一的 $\beta$ 函数，该函数无缝连接了 WL 和 SL 区域，并且基于退相长度描述了电导率从高到低 $T$ 区域的温度（$T$）依赖性。 我们发现，Seebeck 系数 $S$ 在 WL 极限下表现为 $S\propto T$，而在 SL 极限下表现为 $S\propto T^{1-p}$ ($p < 1$)，两者都可能具有对数校正。 该方案被用于分析 p 型有机半导体聚[2,5-双(3-烷基噻吩-2-基)噻吩并[3,2-b]噻吩] (PBTTT) 薄膜的实验数据。 显示英文摘要

摘要： We develop a new theoretical scheme for charge transport and thermoelectric response in two-dimensional disordered systems exhibiting crossover from weak localization (WL) to strong localization (SL). The scheme is based on the scaling theory for Anderson localization combined with the Kubo-Luttinger theory. Key aspects of the scheme include introducing a unified $\beta$ function that seamlessly connects the WL and SL regimes, as well as describing the temperature ($T$) dependence of the conductance from high to low $T$ regions on the basis of the dephasing length. We found that the Seebeck coefficient, $S$, behaves as $S\propto T$ in the WL limit and as $S\propto T^{1-p}$ ($p < 1$) in the SL limit, both with possible logarithmic corrections. The scheme is applied to analyze experimental data for thin films of the p-type organic semiconductor poly[2,5-bis(3-alkylthiophen-2-yl)thieno(3,2-b)thiophene] (PBTTT).