heterostructures*

The Td (orthorhombic) phase of WTe₂, a transition metal dichalcogenide (TMD), is a type-II Weyl semimetal (WSM) when a few monolayer thick. Topological semimetals with broken time-reversal symmetry have recently garnered attention due to the ability to manipulate Weyl nodes, causing interesting electro-magnetic responses. Realizing a magnetic WSM in the thin film form, however, is challenging. In this talk, we present our studies on the magnetic properties of WTe₂/VTe₂ thin film heterostructures. Using molecular beam epitaxy, we grow WTe₂ in its Td phase confirmed by in situ reflection high energy electron diffraction. Ultra-smooth film showing atomic terraces and Raman spectroscopy confirm film quality. We perform systematic transport measurements on WTe₂/VTe₂ heterostructures with vanadium doping to form (W_1-xV_x)Te₂, varying x from 0% to 20%. V-doping also changes the Fermi level in WTe₂ and induces a carrier type change. An anomalous Hall effect (AHE) signal is observed, whose magnitude varies with the doping level, reaching a minimum near the charge compensation point. The sign of AHE does not change with carrier type. The origin of the AHE will be discussed.