Predicted Unusual Magnetoresponse in Type-II Weyl Semimetals

TL;DR

This paper predicts unique magnetoresponse signatures in type-II Weyl semimetals, including Landau level collapse at a critical angle and distinctive magneto-optical features, advancing understanding of their electronic behavior under magnetic fields.

Contribution

It introduces the concept of Landau level collapse at a critical angle in type-II Weyl semimetals and details associated magneto-optical signatures, a novel insight into their magnetic response.

Findings

Landau levels collapse at a critical angle regardless of field strength

Presence of intraband peaks in magneto-optical spectrum

Absence of absorption tails and anisotropic field dependence

Abstract

We show several distinct signatures in the magneto-response of type-II Weyl semimetals. The energy tilt tends to squeeze the Landau levels (LLs), and for a type-II Weyl node, there always exists a critical angle between the B-fileld and the tilt, at which the LL spectrum collapses, regardless of the fileld strength. Before collapse, signatures also appear in the magneto-optical spectrum, including the invariable presence of intraband peaks, the absence of absorption tails, and the special anisotropic fileld dependence.