Quantum phase transitions in the extended periodic Anderson model

Jeong Yong Lee, R. Bulla

Raymond Chan, Ian P. McCulloch, M. Gulácsi

Thomas Schäfer, A. A. Katanin, Motoharu Kitatani +2 more

Akihisa Koga, Norio Kawakami, Robert Peters +1 more

We investigate quantum phase transitions in the extended periodic Anderson model, which includes electron correlations within and between itinerant and localized bands. We calculate zero and finite temperature properties of the system using the combination of dynamical mean-field theory and the numerical renormalization group. At half filling, a first-order phase transition between a Mott insulating state and a Kondo insulating state occurs in the strong-coupling regime. We furthermore find that a metallic state is stabilized in the weak-coupling regime. This state should be adiabatically connected to the orbital selective Mott state with one orbital-localized and the other itinerant. The effect of hole doping is also addressed.

Laad, Mukul S., Koley, S., Taraphder, A.

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 DMFT, we find that a quantum critical phase with anomalous ω/T scaling separates a heavy Landau-Fermi liquid from ordered phase(s).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 selective-Mott phase .We show how this naturally leads to scale-invariant responses in transport.Our work is represents a specific (DMFT) realization of the hidden-FL and FL * theories, and holds promise for study of "strange" metal phases in quantum matter.

Amit Dutta, G. Aeppli, Bikas K. Chakrabarti +3 more