Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 66: Poster Wednesday: 2D Materials

O 66.4: Poster

Mittwoch, 3. April 2019, 17:45–20:00, Poster B2

Structural and electronic properties of epitaxial single-layer NbS2 on Au(111) — •Raluca-Maria Stan, Sanjoy Mahatha, Charlotte Sanders, Davide Curcio, Marco Bianchi, Philip Hofmann, and Jill A. Miwa — Department of Physics and Astronomy, Interdisciplinary Nanoscience Center (iNANO), Aarhus University, 8000 Aarhus C, Denmark

In this study, the epitaxial growth of single layer NbS2 on a Au(111) substrate has been achieved and techniques like scanning tunneling microscopy, low-energy electron diffraction, and angle-resolved photoemission spectroscopy have been used in order to investigate its structural and electronic properties. The excellent crystalline quality is revealed by the well-ordered hexagonal moiré superstructure and a well-defined orientation with respect to the Au(111) substrate. An accurate determination of the hexagonal lattice constant indicates agreement with the lattice parameter of the bulk parent compound. The electronic structure reveals two electron pockets crossing the Fermi level with appreciable broadening that can be due to hybridization with the substrate or strong many-body effects in the system. The metallic character has been shown and the general shape of the band structure is consistent with the 1H configuration. No indication of a charge density wave formation has been observed at a temperature down to 30 K.

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