Nucleation Stage for the Oriented Growth of Tantalum Sulfide Monolayers on Au(111)

Thais Chagas, Kai Mehlich, Abdus Samad, Catherine Grover, Daniela Dombrowski, Jiaqi Cai, Udo Schwingenschlögl, Carsten Busse

Research output: Contribution to journalArticlepeer-review

Abstract

We study the nucleation stage in the epitaxial growth of monolayer TaS2 as a model system for monolayer transition-metal sulfides. The growth was done under ultrahigh-vacuum conditions with Au(111) as a substrate on which the metal atoms are evaporated, and the sulfur is provided from a background of H2S. Using scanning tunneling microscopy, we find atomic-scale protrusions with a well-defined triangular shape that act as nuclei for the further growth of extended tantalum sulfide monolayers. We identify these protrusions as TaS3 using density functional theory. We propose that their unique orientation is the cause of the well-defined orientation of a complete TaS2 layer found under favorable growth conditions.
Original languageEnglish (US)
JournalThe Journal of Physical Chemistry C
DOIs
StatePublished - Mar 13 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-03-16
Acknowledgements: The authors acknowledge technical assistance from D. Rybakowski. We also thank T. Michely (Universität zu Köln) for continuous support and V. Enenkel (University of Konstanz) for discussions. T.C. acknowledges financial support from CAPES/PDSE/Process number {-88881.188652/2018-01} and the Alexander von Humboldt Foundation. The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • General Energy
  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials

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