Temperature-Dependent Fermi Surface Evolution in Heavy Fermion CeIrIn(5)

Abstract

We address theoretically the evolution of the heavy fermion Fermi surface (FS) as a function of temperature (T), using a first principles dynamical mean-field theory approach combined with density functional theory. We focus on the archetypical heavy electrons in CeIrIn5. Upon cooling, both the quantum oscillation frequencies and cyclotron masses show logarithmic scaling behavior [similar to ln(T-0/T)] with different characteristic temperatures T-0 = 130 and 50 K, respectively. The enlargement of the electron FSs at low T is accompanied by topological changes around T = 10-50 K. The resistivity coherence peak observed at T similar or equal to 50 K is the result of the competition between the binding of incoherent 4f electrons to the spd conduction electrons at Fermi level (E-F) and the formation of coherent 4f electrons.