Fermiology in a Local Quantum Critical Metal

TL;DR

This paper investigates the origins of non-Lifshitz-Kosevich scaling and broad spectral features in strange metals, linking them to Kondo destruction and infra-red continuum behavior in a local quantum critical phase of an extended periodic Anderson model.

Contribution

It reveals a common infra-red continuum feature caused by Kondo destruction that explains non-Lifshitz-Kosevich scaling and broad spectral responses in local quantum critical metals.

Findings

Identifies Kondo-destruction-driven infra-red continuum as key to non-Lifshitz-Kosevich scaling.

Proposes a modified Dingle scaling for testing local criticality.

Links strange metal behavior to orbital-selective Mott transition.

Abstract

Recent experimental work has brought the twin issues of the origin of non-Lifshitz-Kosevich scaling in de Haas van Alphen (dHvA) and its precise relation to anomalously broad non-quasiparticle spectral features in "strange" metals, to the forefront. Here, we revisit these issues in the specific context of a "local" quantum critical phase in an extended periodic Anderson model (EPAM). In contrast to the famed Kondo-RKKY scenarios for local quantum criticality, strong local valence fluctuations cause Kondo destruction in the EPAM. We uncover a common underlying element, namely, the Kondo-destruction-driven infra-red continuum branch-cut behavior in the one-electron propagator, as the relevant feature that governs both non-Lifshitz-Kosevich scaling in dHvA and anomalously broad non-quasiparticle spectral responses in such a "strange" metal. Employing a non-perturbative scheme to treat effects of non-magnetic disorder in this version of a local strange metal, we propose a modified Dingle scaling that can also be used to test "local" criticality scenarios. Thus, our findings potentially afford an internally consistent description of novel fermiology expected to manifest in strange metals arising as a result of Kondo-destruction coming from an underlying orbital-selective Mott transition.