Combining ab initio Methods and many-Body Theory to Describe the Electron-Phonon Interaction in Real Materials

结合从头计算方法和多体理论来描述实际材料中的电子-声子相互作用

• 批准号: 9973225
• 负责人: James Freericks
• 金额: $ 24.5万
• 依托单位: Georgetown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-08-01 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9973225&HistoricalAwards=false
• 关键词: Combining; ab; initio; Methods; many

9973225Freericks/LiuThis grant supports two young faculty members in condensed matter physics at the Georgetown University. There is also an international component with Croatia funded by the International division. The grant supports theoretical and computational studies of several effects that are not included in the standard Migdal-Eliashberg treatment of electron-phonon superconductivity. A combination of first-principles electronic structure calculations and many-body theoretical techniques will be used to study these effects in real materials. The work will help elucidate how and when the conventional theory of electron-phonon superconductors breaks down in real materials, and will contribute to development of better methods for understanding the properties of superconducting materials.This grant is to support research of two young faculty with complementary interests and expertise in the theory of superconductivity. The grant is funded jointly by the Divison of Materials Research and the International division. A major difference between the conventional superconductors and essentially all of the ones that have been discovered recently (doped fullerenes, high Tc materials) is that the theoretical framework, so successful in superconductivity in conventional materials, cannot be applied to the new materials. This project will analyze difficulties and find solutions for them.

9973225Freericks/Liuthis Grant支持乔治敦大学的两名年轻教职员工。克罗地亚也有国际部门资助的国际组成部分。 该赠款支持对电子 - phonon超导性的标准Migdal-Eliashberg处理中未包括的几种效应的理论和计算研究。 第一原理电子结构计算和多体理论技术的结合将用于在实际材料中研究这些效果。 这项工作将有助于阐明电子波超导体的传统理论如何分解在实际材料中，并将有助于开发更好的方法，以理解超导材料的特性。这项拨款是为了支持两位具有互补兴趣和专业知识的年轻教师的研究理论。该赠款由材料研究和国际部门的分区共同资助。 传统超导体与最近发现的所有（掺杂富勒烯，高TC材料）之间的主要区别在于，在常规材料的超导性方面如此成功的理论框架不能应用于新材料。该项目将分析困难并为他们找到解决方案。