论文标题
狭窄的二维导体的磁磁性中经典尺寸效应和电子粘度的表现：理论和实验
Manifestations of classical size effect and electronic viscosity in the magnetoresistance of narrow two-dimensional conductors: Theory and experiment
论文作者
论文摘要
我们在狭窄的通道中开发了2D电子的磁转移的经典动力学理论，该理论具有部分扩散的边界散射，并将其应用于在温度间隔4.2-30 K中测量的磁倍率的描述，该磁静脉内的长度中镜杆在高纯度GAAS GAAS量子量子量子结构中制成的长中镜杆中。实验和理论都证明了由于运输的弹道率高，这是由于尺寸效应在二维中尺寸效应引起的许多特征。除了前面描述的功能外，我们还揭示了当磁盘轨道直径等于通道宽度的一半时，第一衍生物的斜率发生了变化。由于电子 - 电子相互作用引起的电子粘度，这些特征因温度而抑制。通过比较理论和实验，我们确定了由电子电子散射引起的电子角度分布的弛豫的特征时间。
We develop a classical kinetic theory of magnetotransport of 2D electrons in narrow channels with partly diffusive boundary scattering and apply it to description of magnetoresistance measured in the temperature interval 4.2-30 K in long mesoscopic bars fabricated from high-purity GaAs quantum well structures. Both experiment and theory demonstrate a number of characteristic features in the longitudinal and Hall resistances caused by the size effect in two dimensions owing to the high ballisticity of the transport. In addition to the features described previously, we also reveal a change in the slope of the first derivative of magnetoresistance when the cyclotron orbit diameter equals to half of the channel width. These features are suppressed with increasing temperature as a result of the electronic viscosity due to electron-electron interaction. By comparing theory and experiment, we determine the characteristic time of relaxation of angular distribution of electrons caused by electron-electron scattering.
