title: Quantum critical phase and Lifshitz transition in an extended periodic Anderson model.
abstract: We study the quantum phase transition in f-electron systems as a quantum Lifshitz transition driven by selective-Mott localization in a realistic extended Anderson  lattice model. Using dynamical mean-field theory (DMFT), we find that a quantum critical phase with anomalous ω/T scaling separates a heavy Landau-Fermi liquid from ordered phase(s). This non-Fermi liquid state arises from a lattice orthogonality catastrophe originating  from orbital-selective Mott localization. Fermi surface reconstruction occurs via the interplay between and penetration of the Green function zeros to the poles, leading to violation of Luttinger's theorem in the strange metal. We show how this naturally leads to scale-invariant responses in transport. Thus, our work represents a specific DMFT realization of the hidden-FL and FL* theories, and holds promise for the study of 'strange' metal phases in quantum matter.
authors.affiliation: Institut für Theoretische Physik, RWTH Aachen University, Aachen 52056, Germany.
authors.forename: M S
authors.initials: MS
authors.lastname: Laad
authors.forename: S
authors.initials: S
authors.lastname: Koley
authors.forename: A
authors.initials: A
authors.lastname: Taraphder