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

9973225 Freericks/刘这笔赠款支持乔治敦大学凝聚态物理学的两名年轻教员。还有一个国际部分，克罗地亚由国际司资助。这笔赠款支持对电子-声子超导的标准Migdal-Eliashberg处理方法中没有包括的几种效应的理论和计算研究。我们将结合第一性原理、电子结构计算和多体理论技术来研究真实材料中的这些效应。这项工作将有助于阐明传统的电子-声子超导体理论如何以及何时在实际材料中崩溃，并将有助于开发更好的方法来理解超导材料的性质。这项拨款是为了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员的研究。这笔赠款由材料研究部和国际部共同资助。传统超导体与几乎所有最近发现的超导体(掺杂富勒烯、高T_c材料)的主要区别在于，在传统材料中如此成功地研究超导电性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。

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.