U.S.-Korea Cooperative Research: Theoretical Study of Dielectric Response Function and Applications to the Screening, Optical, & Superconducting Properties of Solid Syst

9604493 Louie这个奖项提供资金，允许博士。加州大学伯克利分校物理系Steven G. Louie和Marvin L. Cohen与韩国科学技术院（KAIST）物理系Kee Joo Chang博士和首尔国立大学理论物理中心Jisoon Ihm博士合作研究介电响应函数及其在固体系统中的应用，为期24个月。应用将用于研究光学性质，准粒子激发能，超导体中的电子-电子排斥相互作用，以及大型系统的介电筛选。最近的理论进步，超越了标准的动量空间形式，使得介质矩阵和固体电子结构的有效第一性原理计算成为可能。所提出的研究的意义在于提供对固体中电子-电子相互作用的更深入的理解，特别是那些表现在交换相关效应和局部场筛选方面的相互作用。合作者是本研究领域公认的专家。他们的合作将包括他们的研究生，目的是在这一科学领域提供美国和韩国之间的智力桥梁。该项目与美韩合作科学项目的目标相关，该项目旨在通过科学信息、思想、技能和技术的交流以及在互利问题上的合作，提高美韩科学家和工程师之间的合作水平。该项目为美国研究生提供国际研究经验。韩国的参与得到了韩国科学工程财团（KOSEF）的支持。* * *

9604493 Louie This award provides funds to permit Drs. Steven G. Louie and Marvin L. Cohen, Department of Physics, University of California, Berkeley, to pursue with Dr. Kee Joo Chang, Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), and Dr. Jisoon Ihm, Center for Theoretical Physics, Seoul National University, for 24 months, a program of cooperative research on the dielectric response function and its applications to solid systems. Applications will be made to investigate optical properties, quasiparticle excitations energies, electron-electron repulsive interactions in superconductors, and dielectric screening of large systems. Recent theoretical advances, going beyond the standard momentum space formalism, have allowed the efficient first-principles calculation of the dielectric matrix and the electronic structure of solids. The significance of the proposed research is to provide deeper insight into the understanding of electron- electron interactions in solids, in particular, those manifested in exchange-correlation effects and local-field screening. The collaborators are recognized experts in the field of this research. Their collaboration, which will include their graduate students, is intended to provide an intellectual bridge between the U.S. and Korea in this field of science. This project is relevant to the objectives of the U.S.-Korea Cooperative Science Program which seeks to increase the level of cooperation between U.S. and Korean scientists and engineers through the exchange of scientific information, ideas, skills, and techniques and through collaboration on problems of mutual benefit. This project provides an international research experience for a U.S. graduate student. Korean participation is supported by the Korea Science and Engineering Foundation (KOSEF). ***