时间分辨及角分辨光电子能谱对重费米子超导体电子结构的研究

重费米子超导体是一类非常规超导体。如高温超导体一样,其超导机理仍然不清楚。研究重费米子超导体，不仅为建立重费米子理论提供实验基础，更有机会为理解高温超导电性提供新的途径。从光谱学角度来讲，重费米子态表现为能带重整化和出现能隙。我们计划采用先进的时间分辨角分辨光电子能谱仪及角分辨光电子能谱仪对重费米子超导体(CeCoIn5和UPd2Al3)相关的超导机理和奇异的正常态物理性质开展系统和深入的研究。主要内容包括：（1）重费米子超导体能隙的本质及其与超导电性和奇异正常态的关系；(2) 重费米子超导体的多体效应，波色子的本质及与超导电性的关系。这些问题的研究将为理解重费米子超导体的超导机理和奇异正常态提供重要信息。

Heavy Fermion superconductors are a type of Unconventional superconductor. As high temperature superconductors,the physics underlying its superconductivity remains elusive after more than 35 years research. Study the heavy Fermion superconductor, not only provides the experimental basis for understanding heavy Fermion, but also sheds more light on the theory of high temperature superconductivity. From a photoelectron spectroscopy perspective, heavy Fermion state characterize by renormalization of band and opening of gaps. Here we propose to build on the initial success and explore the nature of the superconducting and anomalous normal state of CeCoIn5 and UPd2Al3 by utilizing time-resolved and angle-resolved photoemission spectroscopy as a main research tool coupled with angle-resolved photoemission spectroscopy:(1) the nature of energy gap and its relation to the superconducting and anomalous normal state;(2) many-body effects and its relation to the superconducting and anomalous normal state.