Physics of Strong Disorder and Correlation

9523361李这个项目的广泛主题领域是强相互作用和随机无序的影响的物理学。 强关联的一个例子是分数量子霍尔效应的物理学，其中电子气受到强磁场的影响，使得只有最低的朗道能级被部分占据。 一个关键的问题是这些系统的复合费米子是否可以描述的费米液体理论。 该项目建议继续研究这一重要系统，并探索新的实验，以提供有关这一迷人的新状态的进一步信息。 所使用的工具包括多体微扰理论、重整化群分析，有时还包括数值分析。 该项目的成功完成将对凝聚态物理的广泛领域产生重大影响，包括其他强相关材料，如高温超导体和重费米子金属。 该项目从理论上研究电子系统，其中电子的排斥力在确定其物理性质方面起着至关重要的作用，以及随机无序对此类系统的影响。 一个重要的例子是分数量子霍尔效应的物理学，其中磁场被施加到在半导体界面处形成的电子气体。 研究者是凝聚态物理学这一领域的杰出领导者，使用最先进的方法。 该项目的成功完成将对凝聚态物理的广泛领域产生重大影响，包括其他强相关材料，如高温超导体和重费米子金属。 ***

9523361 Lee The broad subject area of this project is the physics of strong interactions and the effect of random disorder. An example of strong correlation is the physics of the fractional quantum Hall effect, where an electron gas is subject to a high magnetic field so that only the lowest Landau level is partially occupied. A key question is these systems is whether the composite fermions can be described by Fermi liquid theory. The project proposes to continue studying this important system and to explore new experiments which may provide further information on this fascinating new state. The tools being used include many- body perturbation theory, renormalization group analysis, and, at times, numerical analysis. A successful completion of this project will have significant impact on a broad area of condensed matter physics, including other strongly correlated materals, such as high temperature superconductors and heavy fermion metals. %%% This project theoretically investigates systems of electrons where their repulsion plays a crucial role in determining their physical properties, and the effects of random disorder on such systems. An example that constitutes an important focus is the physics of the fractional quantum Hall effect, in which a magnetic field is applied to a gas of electrons that forms at an interface in semiconductors. The investigator is a distinguished leader in this area of condensed-matter physics, using state-of-the art methods. A successful completion of this project will have significant impact on a broad area of condensed matter physics, including other strongly correlated materals, such as high temperature superconductors and heavy fermion metals. ***