Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 66: 2D Materials IV: Interfacial Interactions (joint session O/CPP/HL)
O 66.4: Talk
Wednesday, March 18, 2020, 11:15–11:30, WIL B321
Complex moiré structures in rotated monolayer V2S3 on Au(111) — •Umut Kamber1, Sahar Pakdel2, Raluca-Maria Stan2, Anand Kamlapure1, Brian Kiraly1, Fabian Arnold2, Andreas Eich1, Arlette S. Ngankeu2, Marco Bianchi2, Jill A. Miwa2, Charlotte Sanders2, Nicola Lanata2, Philip Hofmann2, and Alexander A. Khajetoorians1 — 1Institute for Molecules and Materials, Radboud University, Nijmegen, The Netherlands — 2Department of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, Aarhus, Denmark
Moiré superlattices have led to the emergence of tunable many-body states of matter like superconductivity and Mott insulator states absent in the individual layers [1,2]. For transition metal dichalcogenides (TMDCs), there has been a strong interest in how electronic structure is modified near the single layer limit and potentially affected by the dielectric environment. Here, we show spatially periodic modifications to the electronic structure of single layer V2S3 grown on Au(111) varying with the underlying moiré pattern [3]. Similar modifications were observed in multiple moiré patterns, each arising from a different relative orientation between the monolayer and the Au(111) substrate. We characterize these spatial variations in electronic structure with respect to the atomic and moiré lattices via scanning tunneling microscopy and spectroscopy, with the help of ab initio calculations.
[1] Y. Cao et al., Nature, 556, 43 (2018).
[2] Y. Cao et al., Nature, 556, 80 (2018).
[3] F. Arnold et al., 2D Mater. 5, 045009 (2018).