Heavy electron materials provide a useful prototype for exploring the underlying mechanism of unconventional superconductivity and new magnetism. Among them is the first d-wave superconductor CeCu2Si2 discovered in 1979. The last ten years have seen many important progresses such as novel quantum criticality, "hidden" order and topological Kondo insulator. However, we still don't have a satisfactory microscopic theory after thirty years of research. In this talk, I will introduce a phenomenological model and show how it leads to a dramatic change in our interpretation of experimental observations and hence the discovery of new universal properties. I will then discuss some recent progresses and the proposal of a new unified framework that may help us better understand heavy electron physics.

 

杨义峰，1997年入北京大学物理系并获得学士和硕士学位，2003年起在德国马普学会固体研究所学习并获得斯图加特大学博士学位。2007年起先后在美国加州大学Davis分校物理系和Los Alamos国家实验室做博士后研究，2010年底回中科院物理所工作并入选中科院百人计划。主要方向为强关联电子体系的理论和数值研究。