Theory of Interacting Fermi Systems

相互作用费米系统的理论-该项目的目标 是为了更深入地理解电子-电子 相互作用及其在固体中的表现。 一种方法 为了实现这一目标，将研究物理性质， 已经发现表现出意想不到的异常行为，例如， 这些现象可以归因于由以下因素引起的对称性破坏： 电子-电子相互作用 建议研究的具体专题 包括在非常低的温度下以K为单位的纵向霍尔效应， 碱金属紫外光异常，双磁振子交换，磁共振 在反铁磁超导体中，声子异常（可能 与自旋密度波相关）在锌、镉和锝中， "光学糖蜜"中的分步结晶，以及 简谐场回旋共振传输 金属. %%% 最好的建立模型描述的行为， 固体中的电子是基于这样一个图像， 几乎彼此独立。 虽然这样的观点是 虽然很成功，但仍有大量的 不能用这个来解释的重要现象 approach. 当电子-电子相互作用变得重要时， 必须发展新的理论描述。 这个项目是 旨在为一系列现象发展这样的描述 这似乎是实验性的，似乎明确取决于 电子-电子相互作用

Theory of Interacting Fermi Systems - The objective of the project is to acquire a deeper understanding of electron-electron interactions and their manifestations in solids. One approach toward this goal will be the study of physical properties which have been found to exhibit unexpected anomalous behavior, e.g., phenomena which can be attributed to broken symmetries caused by electron-electron interactions. Specific topics proposed for study include the longitudinal Hall effect in K at very low temperatures, ultraviolet optical anomalies in alkali metals, two magnon exchange in antiferromagnetic superconductors, phonon anomalies (possibly related to spin density waves) in zinc, cadmium, and technetium, fractional crystallization in 'optical molasses', and perpendicular-field cyclotron-resonance transmission in simple metals. %%% The best-established model descriptions for the behavior of electrons in solids are based on a picture where electrons are nearly independent of each other. Although such a viewpoint is quite successful, there are nevertheless a large number of important phenomena which cannot be explained properly by this approach. When electron-electron interactions become important, new theoretical descriptions must be developed. This project is aimed at developing such descriptions for a range of phenomena which appear experimentally and appear to depend explicitly on electron-electron interactions.