Spectromicroscopy of 2D interfaces

Principal investigators

Niels Schröter, MPI of Microstructure Physics – Halle, niels.schroeter (at) mpi-halle.mpg.de [webpage]

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Abstract

Interfaces made from (twisted) 2D materials have been demonstrated to host a variety of fascinating electronic phenomena, such as exotic superconducting and insulating phases or orbital magnetism. However, to gain a deeper insight into the microscopic origin of these phenomena that could lead to their functionalization, a direct probe of their electronic structure is needed. Whilst magnetotransport and conventional optical spectroscopy have long been employed for such studies, angle-resolved photoelectron spectroscopy (ARPES), one of the most powerful tools to directly image the electronic structure of solids, is often unfeasible because the spatial dimension of many 2D interfaces is smaller than the spatial resolution of most ARPES setups.

Here, we will perform ARPES with micro- and nano-focused photon beams to overcome these limitations. We will employ a micro-focused laser beam at our institute in combination with a deflection mode analyser. Complementary studies will be performed with our partners at the nano-ARPES beamline I05 of the Diamond Light Source (UK).