Signature of topological band crossing in ferromagnetic Cr1/3NbSe2 epitaxial thin film

TL;DR

This study uses angle-resolved photoemission spectroscopy to demonstrate topological Weyl crossings in ferromagnetic Cr1/3NbSe2 thin films, revealing their nature as topological ferromagnets and highlighting I-TMDCs as platforms for magnetic-topological physics.

Contribution

First experimental evidence of topological Weyl crossings in ferromagnetic Cr1/3NbSe2 epitaxial thin films using photoemission spectroscopy.

Findings

Cr1/3NbSe2 exhibits Weyl band crossings.

Cr1/3NbSe2 is confirmed as a topological ferromagnet.

I-TMDCs are promising platforms for magnetic and topological physics.

Abstract

In intercalated transition metal dichalcogenides (I-TMDC), transition metal intercalation introduces magnetic phases which in some cases induce topological band crossing. However, evidence of the topological properties remains elusive in such materials. Here we employ angle-resolved photoemission spectroscopy to reveal the band structure of epitaxially grown ferromagnetic Cr1/3NbSe2. Experimental evidence of the Weyl crossing shows Cr1/3NbSe2 to be a topological ferromagnet. This work highlights I-TMDC as platform towards the interplay of magnetic and topological physics in low-dimensional systems.