Perturbative Kondo destruction and global phase diagram of heavy fermion metals

TL;DR

This paper develops a field-theoretic approach to understand the quantum critical point in heavy fermion metals, revealing how the Kondo effect is destroyed or dominates, and mapping the global phase diagram.

Contribution

It introduces a novel renormalization group framework analyzing Kondo destruction from the magnetically ordered side, advancing understanding of heavy fermion quantum criticality.

Findings

Identifies a quantum critical point where the Kondo effect transitions from destruction to dominance.

Elucidates the global phase diagram of heavy fermion metals.

Provides a unified theoretical framework for Kondo destruction phenomena.

Abstract

Strange metals represent a foundational problem in quantum condensed matter physics, and heavy fermion systems provide a canonical setting to advance a general understanding. The concept of a Kondo destruction quantum critical point is widely invoked to describe the competition of the Kondo effect and the local-moment magnetism. Here, we develop a unified field-theoretic approach, analyzing this competition from a rare approach that is anchored by the magnetically ordered side. Our analysis reveals, for the first time within a renormalization group framework, a quantum critical point across which the Kondo effect goes from being destroyed to dominating. Our findings elucidate not only the Kondo destruction quantum criticality but also an accompanying global phase diagram of heavy fermion metals.