Magnetoresistance Anisotropy in WTe$_{\mathrm{2}}$

We report the angle dependence of the magnetoresistance in WTe$_{\mathrm{2}}$. Being a layered material, WTe$_{\mathrm{2}}$ is considered to be electronically two-dimensional (2D). Our results demonstrate that it is in fact 3D with an anisotropy of effective mass as small as 2. We measured the magnetic field dependence of the sample resistance R(H) at various angles between the applied magnetic field with respect to the c-axis of the crystal and found that they can be scaled based on the mass anisotropy, which changes from \textasciitilde 2 to \textasciitilde 5 with decreasing temperature in the Fermi liquid state. We will also discuss the origin of the turn-on temperature behavior in this material.