# Competition between disorder and interaction effects in 3D Weyl semimetals

## TL;DR

This paper studies how disorder and electron interactions compete in 3D Weyl semimetals, revealing a phase diagram with a disorder-driven transition and various electronic phases.

## Contribution

It provides a renormalization group analysis of disorder and interactions in 3D Weyl semimetals, identifying fixed points and phase boundaries.

## Key findings

- Disorder-driven transition to diffusive metal phase.
- Strong increase in critical disorder strength due to interactions.
- Presence of a renormalized semimetallic phase and non-Fermi liquid phase.

## Abstract

We investigate the low-energy scaling behavior of an interacting 3D Weyl semimetal in the presence of disorder. In order to achieve a renormalization group analysis of the theory, we focus on the effects of a short-ranged-correlated disorder potential, checking nevertheless that this choice is not essential to locate the different phases of the Weyl semimetal. We show that there is a line of fixed-points in the renormalization group flow of the interacting theory, corresponding to the disorder-driven transition to a diffusive metal phase. Along that boundary, the critical disorder strength undergoes a strong increase with respect to the noninteracting theory, as a consequence of the unconventional screening of the Coulomb and disorder-induced interactions. A complementary resolution of the Schwinger-Dyson equations allows us to determine the full phase diagram of the system, showing the prevalence of a renormalized semimetallic phase in the regime of intermediate interaction strength, and adjacent to the non-Fermi liquid phase characteristic of the strong interaction regime of 3D Weyl semimetals.