Journal Article

FZJ-2024-06995

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png 2D Vanadium Sulfides: Synthesis, Atomic Structure Engineering, and Charge Density Waves

van Efferen, C. (Corresponding author) ; Hall, J. ; Atodiresei, N.FZJ* ; Boix, V. ; Safeer, A. ; Wekking, T. ; Vinogradov, N. A. ; Preobrajenski, A. B. ; Knudsen, J. ; Fischer, J. ; Jolie, W. ; Michely, T.

2024
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsnano.3c05907  doi:10.34734/FZJ-2024-06995

Abstract: 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.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (PGI-1)

Research Program(s):

1. 5211 - Topological Matter (POF4-521) (POF4-521)
2. SFB 1238 A01 - Konstruktion von 2D-Heterostrukturen für die Kontrolle elektronischer, optischer und magnetischer Eigenschaften (A01) (319464028) (319464028)
3. SFB 1238 B06 - Rastertunnelspektroskopie (B06) (319897474) (319897474)
4. SFB 1238 C01 - Strukturinversionsasymmetrische Materie und Spin-Orbit-Phänomene mittels ab initio (C01) (319898210) (319898210)

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 15 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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