U.S.-Korea Cooperative Research on Electron Correlation Effects and Dielectric Functions of High-Tc Superconducting Oxides

美韩合作研究高温超导氧化物的电子相关效应和介电功能

• 批准号: 9022338
• 负责人: Marvin Cohen
• 金额: $ 1.15万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-09-15 至 1994-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9022338&HistoricalAwards=false
• 关键词: U.S.; Korea; Cooperative; Research; Electron

This proposal requests funds to permit Dr. Marvin L. Cohen, Professor of Physics, University of California, Berkeley, to pursue with Dr. Jisoon Ihm, Professor of Physics, Seoul National University, and Dr. Kee Joo Chang, Professor of Physics, Korea Advanced Institute of Science and Technology (KAIST), for a period of 24 months, a program of cooperative research on the electronic properties of high temperature superconductors. New theoretical approaches recently have been developed to examine how electrons interact in solids. These approaches will be applied to study electron-electron interactions and superconductivity, in general, with specific applications to the high transition temperature superconducting oxides. The field of high temperature superconductivity recently has attracted much attention with the discovery of high temperature superconductivity in oxides. Although many mechanisms have been suggested to explain this phenomenon, at present there is no consensus regarding its basic cause. The three collaborators will use a new approach to study these systems, with a dielectric function scheme for interactions between electrons and phonons and between electrons and collective electronic excitations. Each of the three scientists involved in this project has worked in this field of research both independently and in collaboration with the PI. The U.S. and Korean collaborators are highly respected scientists who not only have extensive individual research records but also a record of successful collaboration in the field of the proposal. 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. Korean participation in the project is supported by the Korea Science and Engineering Foundation (KOSEF). The PI's primary research costs are supported under NSF Grant No. DMR-8818404, to which the present project adds an international cooperative dimension.

该提案要求提供资金，允许加州大学伯克利分校物理学教授 Marvin L. Cohen 博士与首尔国立大学物理学教授 Jisoon Ihm 博士和韩国科学技术院 (KAIST) 物理学教授 Kee Joo Chang 博士开展为期 24 个月的高温超导体电子特性合作研究项目。 最近开发了新的理论方法来研究电子如何在固体中相互作用。 一般来说，这些方法将用于研究电子-电子相互作用和超导性，特别适用于高转变温度超导氧化物。 近年来，随着氧化物高温超导性的发现，高温超导领域备受关注。 尽管人们提出了许多机制来解释这种现象，但目前对其根本原因尚未达成共识。 三位合作者将使用一种新方法来研究这些系统，采用介电函数方案来研究电子和声子之间以及电子和集体电子激发之间的相互作用。 参与该项目的三名科学家均独立或与 PI 合作从事该研究领域的工作。 美国和韩国的合作者都是备受尊敬的科学家，他们不仅拥有广泛的个人研究记录，而且在该提案领域也有成功的合作记录。 该项目与美韩合作科学计划的目标相关，该计划旨在通过科学信息、思想、技能和技术的交流以及在互利问题上的合作来提高美国和韩国科学家和工程师之间的合作水平。 韩国参与该项目得到了韩国科学与工程基金会（KOSEF）的支持。 PI 的主要研究费用由 NSF 拨款号 DMR-8818404 提供支持，目前的项目增加了国际合作的维度。