arrow icon

Vol. 35 Issue 5, pp.191-211  (2015) [ 21 Pages ]

Two-fluid theory for heavy fermion materials

Yang Yi-Feng
1. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;2. Collaborative Innovation Center of Quantum Matter, Beijing 100190, China

Xie Neng
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Li Yu
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Published 2016/06/16

The dual (simultaneously localized and itinerant) nature of strongly correlated electrons can be traced back to the particle-wave duality in quantum mechanics and is the origin of numerous exotic quantum phenomena in correlated materials. Here we discuss the various experimental aspects of this dual behavior of f-electron and focus on the phenomenological two-fluid theory recently developed for heavy fermion materials. The two-fluid theory has been quite successful in explaining many puzzling experiments and revealing the common nature of the complex behaviors of many heavy fermion compounds. It provides a new avenue for understanding the exotic properties of strongly correlated systems including cuprates and iron-based superconductors and demands further theoretical and experimental investigations.

FULL TEXT: [PDF]
CLC: O469
KEYWORDS: strongly correlated electrons; heavy fermions; two-fluid theory