Kondo effects in α and γ phases of Ce

The Kondo effect is one of the fascinating correlation phenomena in condensed matter physics. The monoatomic compound Ce, which is famous for the α - γ phase transition and the extremely rich phase diagram with at least seven allotropes, is a good sample for observing the Kondo effect and its change with respect to the temperature or pressure variations. In this research, we focused on the Kondo physics in α and γ phase among the various phases of Ce. To capture the Kondo physics, we used the first principles Dynamical Mean-Field Theory (DFMT) approach combined with Density Functional Theory (DFT)[1,2]. Unlike the cases of using DFT only, we have observed in the DFT+DMFT scheme that Kondo resonances are formed distinctly for α and γ phases of Ce, which yields different band structures between two phases, especially at around E_F. We theoretically discuss the temperature-dependent physical properties of both phases, and compare their band structures with photoemission experimental results.