flakes

In our study, by using micro-focused laser angle-resolved photoemission spectroscopy (ARPES) in combination with the 2D materials manufacturing system (2DMMS) that can freely stack atomic layers by image recognition, machine learning, and autonomous robotic assembly, we developed a high-throughput procedure for investigating the band dispersions of atomically thin micro-flakes. We prepared 2D WTe₂ flake samples for ARPES by using the Graphite / h-BN as a substrate and by encapsulating with graphene. We successfully observed the thickness-dependent band structures of the atomically thin WTe₂ flakes. This sample fabrication procedure for ARPES should be applicable to a wide range of micro-flakes samples, such as heterostructures and twisted materials.