Anisotropic Superconductivity in Atomically Thin (Sn_1-xIn_x)Bi₂Te₄

Combining superconductivity with non-trivial band topology has been an emerging research area in recent years. It is especially appealing to identify material candidates in the van der Waals family of compounds where atomically thin films may allow the control of carrier density and disentanglement of bulk and topological states. In this talk, I will describe our progress in measuring and understanding the thickness-dependent electronic response of topological superconductor candidate (Sn_1-xIn_x)Bi₂Te₄. By decreasing the thickness from bulk to several layers we observe an increase in anisotropy of the superconducting state with high in-plane critical fields. Furthermore, I will discuss non-linear transport measurements above the critical temperature and their implications for the nature of superconductivity in this material.