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HL: Fachverband Halbleiterphysik

HL 47: 2D Materials IV: Interfacial Interactions (joint session O/CPP/HL)

HL 47.1: Vortrag

Mittwoch, 18. März 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.