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.

9973225 Freericks/Liu该基金支持乔治敦大学凝聚态物理学的两名年轻教师。还有一个国际部分，克罗地亚由国际司资助。 该基金支持对电子-声子超导的标准Migdal-Eliashberg处理中不包括的几种效应的理论和计算研究。 第一性原理电子结构计算和多体理论技术的结合将被用来研究这些效应在真实的材料。 这项工作将有助于阐明电子-声子超导体的传统理论如何以及何时在真实的材料中被打破，并将有助于发展更好的方法来理解超导材料的性质。这项拨款将支持两名在超导理论方面具有互补兴趣和专业知识的年轻教师的研究。该赠款由材料研究部和国际部共同资助。 传统超导体与最近发现的所有超导体（掺杂富勒烯，高Tc材料）之间的主要区别在于，在传统材料中超导性如此成功的理论框架不能应用于新材料。这个项目将分析困难并找到解决方案。