Scanning Tunneling Microscopy of Candidate Majorana States in Josephson Junctions

In this talk we will present progress on scanning tunneling microscopy (STM) and spectroscopy (STS) probes of devices that meet the theoretical requirements to support Majorana Zero Modes (MZMs). We will detail our nanofabrication process to create candidate Majorana systems that are tailored for compatibility with cryogenic STS probing. We will present STM and STS data acquired on Josephson Junctions constructed from superconducting niobium and topological insulator bismuth selenide. Our main target is to probe Josephson vortices in these devices that result from an applied magnetic field.