Unraveling the mesoscale surface and electronic structure in Co3Sn2S2

Co3Sn2S2 is a Magnetic Weyl Semimetal with multiple mesoscale cleave terminations for its crystal. These terminations have been observed to alter the topological surface states that connect the Weyl points. As a surface senstitive probe, photoemission-based methods are uniquely suited to studying electronic, chemical and atomic structure on the same mesoscales. Using micro-focused synchrotron photoemission, we identify signatures of different surface terminations in angle-resolved photemission, x-ray photoemission and photoelectron diffraction spectroscopies. This multi-technique approach for connecting surfacve atomic and electronicstructure is broadly applicable to any material with characteristic surface electronic structure that depends on variable surface chemistry.