Low and higher energy quasiparticle excitations in high-Tc superconductors

该应用程序旨在支持和继续与罗马'La Sapienza'大学物理系固态理论组的长期和公认的合作。在过去的十年中，这种合作在高温超导领域取得了许多丰硕的成果和出版物。本项目的科学目的是进一步了解高Tc铜酸盐中的准粒子激发，无论是在这些系统中存在的强相关性，还是在电子-声子耦合机制的背景下。更具体地说，该项目的主要重点是以下三个主题：（a）分析准粒子和动态电荷密度波之间耦合产生的单粒子谱;（B）研究电子关联和传递性电子-声子耦合之间的相互作用，及（c）计算该对中的激振-对通道的铜氧化物超导体的俄歇截面和非均匀条纹状态的配对涨落。

This application is aimed to support and continue a long-standing and acknowledged cooperation with the Solid State Theory group of the department of Physics at the University of Rome ’La Sapienza’. Within the past decade this cooperation resulted in numerous fruitful results and publications in the field of high-temperature superconductivity. The scientific aim of the present project is in the further understanding of quasiparticle excitations in the high-Tc cuprates, both with regard to the strong correlations present in these systems but also in the context of electron-phonon coupling mechanisms. More specifically the main emphasis of the project is on the following three topics: (a) Analysis of the single-particle spectra arising from the coupling between quasiparticles and dynamical charge density waves; (b) Investigation of the interplay between electronic correlations and transitive electronphonon couplings, and (c) the calculation of excitations in the pair-pair channel with regard to both the Auger cross section of cuprate superconductors and also the pairing fluctuations of inhomogeneous stripe states.