Signature of topological band crossing in ferromagnetic Cr_{1/3}NbSe_{2} epitaxial thin film

Abstract

In intercalated transition metal dichalcogenides (I-TMDCs), 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 Cr_{1/3}NbSe_{2}. Experimental evidence of the Weyl crossing shows Cr_{1/3}NbSe_{2} to be a topological ferromagnet. This Letter highlights I-TMDCs as a platform towards the interplay of magnetic and topological physics in low-dimensional systems.