重费米子材料CeCoIn5及其掺杂系统的磁性与超导

探索强关联电子系统异常物理性质并阐释其机理是目前凝聚态物理的前沿领域之一。作为强关联电子系统研究的传统领域，重费米子物理还有许多基础问题尚未解决。本课题拟结合Muon Spin Relaxation/Rotation实验技术和低温强磁场下的输运、热学测量，研究重费米子材料中的磁性与超导现象。以具有代表性的超导与磁共存的重费米子材料CeCoIn5及其掺杂系统为研究对象，从异常超导电性、非费米液体行为以及该重费米子体系的微观机制等方面进行深入研究。本项目将为解决重费米子物理中的基础问题提供重要线索，为实现将强关联电子系统中体现出的特异物理性质应用到器件中奠定基础。

Probing and understanding the novel properties of the strong correlated electron systems is one of the frontiers of condensed matter physics. In particular, the traditional field of heavy fermion still has many questions that need to be addressed. We propose to study the magnetism and superconductivity in heavy fermion compound CeCoIn5 and its doping alloys by performing muon spin relaxation/rotation, electrical transport, and thermal measurements at low temperature and strong magnetic field, to explore the unconventional superconductivity, non-Fermi-liquid behavior, and micromechanism of heavy fermion systems. The proposed work will help to comprehend the complex heavy fermion physics and offer more opportunities to apply novel properies of strong correlated electron system to the fabrication of devices.