Epitaxial single layer NbS${}_2$ on Au(111): synthesis, structure, and electronic properties

Abstract

We report on the epitaxial growth of single layer NbS${}_2$ on Au(111) and determine both its crystalline and electronic structure by a combination of low-energy electron diffraction, scanning tunnelling microscopy and angle-resolved photoemission spectroscopy. The layer is found to grow in the 1H structural phase with a lattice constant of (3.29$\pm$0.03)~Å, a value comparable to the bulk 2H NbS${}_2$ 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 NbS${}_2$-substrate interaction or with the recently reported interplay of strong many-body effects in single layer NbS${}_2$ \cite{Loon:2018aa}. No indications of a charge density wave are observed.

6 pages, 5 figures

References in corpus (8)

• Two Dimensional Atomic Crystals
• Observation of giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
• Superconducting density of states and vortex cores of 2H-NbS2
• Electronic Structure of Epitaxial Single-Layer MoS${}_2$
• Origin of superconductivity and latent charge density wave in NbS${}_2$
• Contact-Induced Semiconductor-to-Metal Transition in Single-Layer WS${}_2$
• Zero-bias conductance peak in detached flakes of superconducting 2H-TaS${}_2$ probed by scanning tunneling spectroscopy
• Electron-phonon coupling in the spin-split valence band of single layer WS${}_2$

Cited by in corpus (1)

• Charge density wave and spin $1/2$ insulating state in single layer 1T-NbS${}_2$