Single-layer ${\mathrm{TaS}}_2$ is epitaxially grown on Au(111) substrates. The resulting two-dimensional crystals adopt the $1H$ polymorph. The electronic structure is determined by angle-resolved photoemission spectroscopy and found to be in excellent agreement with density functional theory calculations. The single-layer ${\mathrm{TaS}}_2$ is found to be strongly $n$ doped, with a carrier concentration of $0.3\left(1\right)$ extra electrons per unit cell. No superconducting or charge density wave state is observed by scanning tunneling microscopy at temperatures down to 4.7 K.

• Received 20 June 2016

DOI:https://doi.org/10.1103/PhysRevB.94.081404