NBIA colloquium by Jill Miwa

Photoemission spectroscopy of advanced materials 

Abstract: New quantum materials can be formed by stacking two-dimensional materials on top of each other like LEGO bricks.

Each layer in the stack can possess its own distinct electronic properties, but the atomic registries and orientations between the layers can also give rise to new quantum phenomenon. To explore these intriguing quantum materials, angle resolved photoemission spectroscopy with spatial resolution down to the nanoscale is used.

I will discuss the recent development of the SGM4 nanoARPES beamline at the ASTRID2 synchrotron at Aarhus University, which not only has excellent energy and momentum resolution, but unprecedented spatial resolution made possible with state-of-the-art x-ray capillary technology.

This technique provides a direct view of the electronic structure of materials that are spatially confined and has opened the door to a new way to research quantum materials.