TY  - JOUR
AU  - van Efferen, Camiel
AU  - Hall, Joshua
AU  - Atodiresei, Nicolae
AU  - Boix, Virginia
AU  - Safeer, Affan
AU  - Wekking, Tobias
AU  - Vinogradov, Nikolay A.
AU  - Preobrajenski, Alexei B.
AU  - Knudsen, Jan
AU  - Fischer, Jeison
AU  - Jolie, Wouter
AU  - Michely, Thomas
TI  - 2D Vanadium Sulfides: Synthesis, Atomic Structure Engineering, and Charge Density Waves
JO  - ACS nano
VL  - 18
IS  - 22
SN  - 1936-0851
CY  - Washington, DC
PB  - Soc.
M1  - FZJ-2024-06995
SP  - 14161 - 14175
PY  - 2024
AB  - Two ultimately thin vanadium-rich 2D materials based on VS2 are created via molecular beam epitaxyand investigated using scanning tunneling microscopy, X-ray photoemission spectroscopy, and density functionaltheory (DFT) calculations. The controlled synthesis of stoichiometric single-layer VS2 or either of the twovanadium-rich materials is achieved by varying the sample coverage and sulfur pressure during annealing. Throughannealing of small stoichiometric single-layer VS2 islands without S pressure, S-vacancies spontaneously order in 1Darrays, giving rise to patterned adsorption. Via the comparison of DFT calculations with scanning tunnelingmicroscopy data, the atomic structure of the S-depleted phase, with a stoichiometry of V4S7, is determined. Bydepositing larger amounts of vanadium and sulfur, which are subsequently annealed in a S-rich atmosphere, self-intercalated ultimately thin V5S8-derived layers are obtained, which host 2 × 2 V-layers between sheets of VS2. Weprovide atomic models for the thinnest V5S8-derived structures. Finally, we use scanning tunneling spectroscopy toinvestigate the charge density wave observed in the 2D V5S8-derived islands.
LB  - PUB:(DE-HGF)16
C6  - 38771774
UR  - <Go to ISI:>//WOS:001228945400001
DO  - DOI:10.1021/acsnano.3c05907
UR  - https://juser.fz-juelich.de/record/1034184
ER  -