Symmetry protected Kondo metals and their phase transitions
Date : May 28, 2016 11:00 ~ 12:00
Speaker : Prof. Sungbin Lee(KAIST)
Location : Bldg. 19, Rm. 210
Motivated by many heavy fermion materials, we study
Kondo lattice model and explore unique physical properties resulting from
special space group symmetries. When the system belongs to
nonsymmorphiccrystals, we found that their symmetries protect Kondo metallic
phases in the large Kondo coupling limit. In the intermediate Kondo coupling
regime, however, the system prefers Kondo insulating phases, breaking their
glide-/screw-symmetries. We generalize our idea classifying the cases with
different non-symmorphicranks and exemplify it in two-dimensional
Shastry-Sutherland lattice.