Mottness scenario for non-Fermi liquid behavior in the periodic Anderson model within Dynamical Mean Field Theory

TL;DR

This paper investigates the Mott transition in the periodic Anderson model using DMFT, revealing a non-Fermi liquid metallic state caused by magnetic scattering, which can be tuned by doping or magnetic field.

Contribution

It demonstrates that non-Fermi liquid behavior in heavy fermion systems can arise without spatial magnetic fluctuations, within a DMFT framework.

Findings

Identification of a non-Fermi liquid metallic state near the Mott transition

Magnetic scattering of doped carriers causes non-Fermi liquid behavior

Non-Fermi liquid state can be tuned by doping or magnetic field

Abstract

We study the Mott metal-insulator transition in the Periodic Anderson Model within Dynamical Mean Field Theory (DMFT). Near the quantum transition, we find a non-Fermi liquid metallic state down to a vanishing temperature scale. We identify the origin of the non-Fermi liquid behavior as due to magnetic scattering of the doped carriers by the localized moments. The non-Fermi liquid state can be tuned by either doping or external magnetic field. Our results show that the coupling to spatial magnetic fluctuations (absent in DMFT) is not a prerequisite to realize a non-Fermi liquid scenario for heavy fermion systems.