Scanning Tunneling Microscopy in high vectorial magnetic fields

The Scanning Tunneling Microscope (STM) is a powerful instrument to measure electronic density of states at surfaces down to atomic scale. Many systems of interest require studying variations as a function of the magnetic field, which is most often applied perpendicular to the surface. Conventional STM setups make it challenging to perform measurements when the magnetic field must be applied in other directions. Here, we describe a new STM, which is small enough to allow for full rotation on a space with a diameter of 37 mm, well below the available space within many magnets. We have installed the STM on a rotatable platform. We show that the new rotatable STM setup preserves the performance of state-of-the-art setups in terms of noise and accuracy. Our new approach significantly enhances control over the direction of the applied magnetic field for STM and opens exciting new possibilities to study quantum materials.