Professor Zachary Fisk
University of California at Davis

Heavy Fermions, Coherence and the Quantum Critical Point

Abstract: The low temperature properties of the Kondo lattice, exemplified here by CeCoIn₅ and its analogs, can be experimentally described as the condensation of a heavy Fermion liquid from a gas of Kondo centers. The argument is made that the establishment of coherence accompanying the formation of the heavy Fermion liquid is identical to the formation of a new Fermi surface which includes the Ce 4f-electron.