Extended Dynamical Mean Field Theory Study of the Periodic Anderson Model

Ping Sun, Gabriel Kotliar
2003 Physical Review Letters  
We investigate the competition of the Kondo and the RKKY interactions in heavy fermion systems. We solve a periodic Anderson model using Extended Dynamical Mean Field Theory (EDMFT) with QMC. We monitor simultaneously the evolution of the electronic and magnetic properties. As the RKKY coupling increases the heavy fermion quasiparticle unbinds and a local moment forms. At a critical RKKY coupling there is an onset of magnetic order. Within EDMFT the two transitions occur at different points and
more » ... ifferent points and the disapparence of the magnetism is not described by a local quantum critical point.
doi:10.1103/physrevlett.91.037209 pmid:12906452 fatcat:vg2luu7shfbzbomwwvrt2h6ojm