Band structure and spin texture of 2D materials for valleytronics: insights from spin and angle-resolved photoemission spectroscopy

Abstract In this review, we present a perspective on the use of angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES (SARPES) for study electronic properties semiconducting transition metal dichalcogenides (TMDCs), prime example two-dimensional (2D) materials valleytronics applications. introductory part, briefly describe structural TMDCs main related physical effects. After short presentation theoretical methods utilized in band structure spin texture calculation TMDCs, illustrate basic principles methodology techniques then provide detailed survey studies these materials. particular, by selecting comparing seminal results field, highlight critical role played sample preparation strategy amount quality information that can be extracted investigations TMDCs. This is followed discussion impact interface potential landscape doping their properties, considering importance contact with electrode and/or dielectric substrate determining electrical transport real devices’ architecture. Finally, summarize key SARPES findings conclude pointing out current open issues directions future photoemission-based 2D systems.