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Competition between Kondo effect and superconductivity in multi-orbital heavy fermion system

Speaker Dr. Feng Lu
Affiliation Institute of Physics, Chinese Academy of Sciences
Date May 22, 2012 (Tue)
Time 5:30 p.m.
Venue Room 522, 5/F, Chong Yuet Ming Physics Building, HKU

Abstract

Using the non-crossing approximation, we present the finite temperature superconducting phase diagram in the multi-orbital heavy fermion superconducting system. Besides the phase transition from the superconducting state to the normal state with the increase of temperature, we find a reentrant behavior of superconducting state due to competition between the superconductivity and the Kondo effect. There are two independent parameters to control the superconducting properties in this multi-orbital heavy fermion superconducting system. At the same time, the orbital degree of freedom also has important influence on the superconducting phase diagram.

Coffee and tea will be served 20 minutes prior to the seminar.