过渡金属氧化物莫特绝缘体及其掺杂体系的缪子自旋弛豫研究

探索强关联电子系统非同寻常的物理性质并对其机理进行理论解释是目前凝聚态物理研究中最具挑战性的前沿领域，其中备受关注的过渡金属化合物由于局域的价电子及自旋轨道耦合效应呈现出众多新奇量子现象。本课题拟结合Muon Spin Relaxation/Rotation 实验技术和极低温输运、热学测量来研究过渡金属氧化物中的微观磁性，以具有强自旋轨道耦合的莫特绝缘体及其掺杂体系为研究对象，从赝能隙、超导电性、量子临界现象等方面进行深入研究。本项目将为形成过渡金属氧化物强关联体系理论描述提供重要的线索，进一步为氧化物电子器件的生产制备与实际应用提供丰富的物理信息。

Probing and understanding the novel properties of the strong correlated electron systems is one of the frontiers of condensed matter physics. In particular, the field of transition metal compounds has always attracted much attention since many extraordinary quantum phenomena were observed in this kind of compounds. We propose to study the microscopic magnetism of Mott insulators by performing muon spin relaxation/rotation, electrical transport, and thermal measurements at extremely low temperature and strong magnetic field, to explore the pseudo energy gap, superconductivity, and quantum critical behaviors of transition metal compounds. The proposed work will help to comprehend the complex physics of transition metal oxides, and offer more opportunities to apply novel properties of strong correlated electron system to the fabrication of devices.