Parity-violating hybridization in heavy Weyl semimetals

TL;DR

This paper presents a model for heavy Weyl semimetals in non-centrosymmetric heavy fermion compounds, highlighting the role of parity-mixing hybridization and surface Kondo breakdown in their temperature-dependent electronic properties.

Contribution

It introduces a simple theoretical model capturing the effects of parity-mixing hybridization and surface Kondo breakdown in heavy Weyl semimetals, predicting temperature-dependent Fermi arc reconfigurations.

Findings

Surface Kondo breakdown causes temperature-dependent Fermi arc changes.

Quantum oscillations show strong temperature dependence at low temperatures.

Thermodynamic and transport measurements reveal renormalization effects.

Abstract

We introduce a simple model to describe the formation of heavy Weyl semimetals in non-centrosymmetric heavy fermion compounds under the influence of a parity-mixing, onsite hybridization. A key aspect of interaction-driven heavy Weyl semimetals is the development of surface Kondo breakdown, which is expected to give rise to a temperature-dependent re-configuration of the Fermi arcs and the Weyl cyclotron orbits which connect them via the chiral bulk states. Our theory predicts a strong temperature dependent transformation in the quantum oscillations at low temperatures. In addition to the effects of surface Kondo breakdown, the renormalization effects in heavy Weyl semimetals will appear in a variety of thermodynamic and transport measurements.