Fractional Quantum Hall Effect and Related Strong Correlation Physics in Advanced Heterostructures

小行星9319264 技术摘要：本文将在低温和强磁场下研究先进的GaAs/A1 xGa 1-xAs异质结构中的分数量子霍尔效应（Fractional Quantum Hall Effect，简称FQHE）和相关的二维强关联物理。 本研究的目的有三：（1）利用新的样品结构研究1/5 μ HE液体的隧穿和液体的沸腾：（2）研究无序在确定1/5 μ HE液体周围的可重入绝缘体的性质中的作用以及控制它们之间转变的物理机制;（3）寻找双电层双稳态中的类约瑟夫森电流。 非技术摘要：在具有不同化学成分的半导体单晶薄膜结构的先进材料中实现二维电子系统已成为可能。 这些电子的物理性质与体半导体中的普通三维电荷载流子有着根本的不同。 具体地，在存在高磁场的情况下，电荷载流子凝结成不可压缩的电子液体。 有人建议进行一系列实验，试图确定这种新液体在什么条件下沸腾，何时以及如果它冻结，它是否冻结成二维电子晶体或其他形式的电子物质。 ***

9319264 Tsui Technical abstract: The fractional quantum Hall effect (FQHE) and related physics of strong correlations in two dimensions will be studied in advanced GaAs/A1xGa1-xAs heterostructures at low temperatures and high magnetic fields. The research has three objectives: (1) To use novel sample structures to study tunneling into the FQHE liquid and to investigate boiling of the liquid; (2) To investigate the role of disorder in determining the nature of the reentrant insulator around the 1/5 FQHE liquid and the physics governing the transition between them; and (3) To search for the Josephson-like currents in the double layer FQHE state. Non-technical abstract: It has been possible to realize two dimensional electron systems in advanced materials of semiconductor single-crystal thin film structures of different chemical compositions. The physical properties of these electrons differ fundamentally from the ordinary three-dimensional charge carriers in bulk semiconductors. Specifically, the charge carriers condense, in the presence of a high magnetic field, into an incompressible electron liquid. It is proposed to carry out a series of experiments which seek to determine under what conditions does this new liquid boil, when and if it freezes, does it freeze into a two dimensional electron crystal or some other form of electron matter. ***