Dresden 2020 – scientific programme
The DPG Spring Meeting in Dresden had to be cancelled! Read more ...
Parts | Days | Selection | Search | Updates | Downloads | Help
O: Fachverband Oberflächenphysik
O 66: 2D Materials IV: Interfacial Interactions (joint session O/CPP/HL)
O 66.1: Talk
Wednesday, March 18, 2020, 10:30–10:45, WIL B321
Interplay between electronic instability and moiré structure of monolayer V2S3 on Au(111) — •Sahar Pakdel1, Umut Kamber2, Raluca-Maria Stan1, Anand Kamlapure2, Brian Kiraly2, Fabian Arnold1, Andreas Eich2, Arlette S. Ngankeu1, Marco Bianchi1, Jill A. Miva1, Charlotte Sanders1, Philip Hofmann1, Alexander A. Khajetoorians2, and Nicola Lanata1 — 1Department of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, Aarhus, Denmark — 2Institute for Molecules and Materials, Radboud University, Nijmegen, The Netherlands
The formation of Moiré superstructures between 2D-materials and their substrates has attracted considerable attention, as it can influence their physical properties. Here we study monolayer V2S3 grown on an Au(111) substrate. Scanning tunneling microscopy experiments exhibit multiple domains with different Moiré structures. Comparing the calculated Fermi surfaces with angle resolved photo-emission spectroscopy data, we find that the substrate induces a substantial shift in the chemical potential. We show that the computed Lindhart function of V2S3 (at the measured chemical-potential) has a pronounced peak corresponding to a second-order reciprocal point of the prevalent Moiré structure. This suggests that the system tends to favor Moiré structures with modulations able to accommodate underlying electronic instabilities of V2S3. We speculate that this could be the manifestation of a more general mechanism and a promising route for tailoring the electronic structure of 2D-materials.