Light-driven Lifshitz transitions in non-Hermitian multi-Weyl semimetals

TL;DR

This paper explores how light can control and generate exceptional contours and induce Lifshitz transitions in non-Hermitian multi-Weyl semimetals, advancing the understanding of topological and exceptional physics.

Contribution

It demonstrates the ability of light to manipulate exceptional contours, generate new ones, and induce Lifshitz transitions in non-Hermitian multi-Weyl semimetals, revealing new control mechanisms.

Findings

Light controls the position of exceptional contours.

Light can generate new exceptional contours.

Lifshitz transitions are controllable by the driving field.

Abstract

Non-Hermitian topological systems are the newest additions to the growing field of topological matter. In this work, we report of the light-driven exceptional physics in a multi-Weyl semi-metal. The driving is not only a key ingredient to control the position of the exceptional contours (ECs), light also has the ability to generate new ECs. Interestingly, we also demonstrate topological charge distribution and Lifshitz transition, which are controllable by the driving field in such generated ECs. Our findings present a promising platform for the manipulation and control over exceptional physics in non-Hermitian topological matter.