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Mixed Wave Function for Heavy Fermion Compounds  

Bang, Yun-Kyu (Department of Physics, Chonnam National University)
Publication Information
Progress in Superconductivity / v.11, no.2, 2010 , pp. 135-140 More about this Journal
Abstract
We propose a variational wave function for the ground state of the magnetic heavy fermion (HF) systems, in which both the Kondo and the RKKY interactions are variationally incorporated and the local f-orbital state exists as a linear combination of a full local moment state and a fully compensated state (mixed wave state). We describe the mechanism for the mixed wave ground state based on the large-N treatment of the Kondo lattice Hamiltonian added with RKKY interaction. With the mixed wave ground state we can explain several puzzling experiments in magnetic HF compounds such as a small value of local moment, coexistence of the antiferromagnetic (AFM) and the paramagnetic (PM) phases, local quantum criticality, etc.
Keywords
heavy fermion; Kondo; RKKY;
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