SKM 2021 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 3: Poster Session I

HL 3.18: Poster

Montag, 27. September 2021, 10:00–13:00, P

Charge transfer in TMDC-graphene heterobilayers with defects — •Daniel Hernangómez-Pérez and Sivan Refaely-Abramson — Weizmann Institute of Science, Rehovot, Israel

Recent experimental and theoretical studies of charge transport in van der Waals heterostructures have revealed a rich arena of electronic and optical phenomena, that span from tunneling spectroscopy [1] to ultrafast interfacial charge transfer after photoexcitation [2, 3]. We focus here on a theoretical study of charge transfer processes occurring at the interface of XS2-graphene heterobilayers with isolated chalcogen vacancies (X = Mo, W). We analyze the low-energy subgap features of the defect states in the presence of graphene and propose a perturbation-based theory to describe electronic transport between the defect states mediated by the graphene layer.

[1] N. Papadopoulos, P. Gehring, K. Watanabe et al. Phys. Rev. B 101, 165303 (2020). [2] L. Yuan, T.-F. Chung, A. Kuc et al. Science Advances 4 (2), 10.1126/sciadv.1700324 (2018). [3] S. Aeschlimann, A. Rossi, M. Chávez-Cervantes et al. Science Advances 6 (20), 10.1126/sciadv.aay0761 (2020).