论文标题
量子孔Corbino结构中的热电
Thermoelectricity in Quantum-Hall Corbino Structures
论文作者
论文摘要
我们测量了量子霍尔效应制度中Corbino结构的热电响应，并将其与理论分析进行比较。测得的热电电压是基于电导率的独立测量的定性和定量模拟，表明它们主要源于电子扩散。与早期的Hall-BAR实验相比，电子 - 光子相互作用不会导致声子拖拉的贡献。这意味着基于单个传输函数对Onsager系数的描述，可以通过单个拟合参数从中预测热电压和电导率。此外，它还让我们预测热电冷却效率的优点数字，对于部分填充的Landau水平（LL）变得非常大，并且可以估计高磁场的高磁场，对于部分填充的Landau水平和高磁场而言，这变得很大。
We measure the thermoelectric response of Corbino structures in the quantum Hall effect regime and compare it with a theoretical analysis. The measured thermoelectric voltages are qualitatively and quantitatively simulated based upon the independent measurement of the conductivity indicating that they originate predominantly from the electron diffusion. Electron-phonon interaction does not lead to a phonon-drag contribution in contrast to earlier Hall-bar experiments. This implies a description of the Onsager coefficients on the basis of a single transmission function, from which both thermovoltage and conductivity can be predicted with a single fitting parameter. It furthermore let us predict a figure of merit for the efficiency of thermoelectric cooling which becomes very large for partially filled Landau levels (LL) and high magnetic fieldse of merit can be estimated which becomes very large for partially filled Landau levels and high magnetic fields.
