Epitaxial single-layer NbS2 on Au(111): Synthesis, structure, and electronic properties

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We report on the epitaxial growth of single-layer NbS2 on Au(111) and determine both its crystalline and electronic structure by a combination of low-energy electron diffraction, scanning tunneling microscopy, and angle-resolved photoemission spectroscopy. The layer is found to grow in the 1H structural phase with a lattice constant of (3.29±0.03) Å, a value comparable to the bulk 2H NbS2 lattice constant. The photoemission data reveals a metallic band structure down to a temperature of 30 K. The observed bands are rather broad and consistent with either a strong NbS2-substrate interaction or with the recently reported interplay of strong many body effects in single-layer NbS2 [van Loon et al., npj Quantum Mater. 3, 32 (2018)10.1038/s41535-018-0105-4]. No indications of a charge density wave are observed.

Original languageEnglish
Article number044003
JournalPhysical Review Materials
Publication statusPublished - 2019

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