Figure 1: Film structure and electronic bands.
From: Charge density wave transition in single-layer titanium diselenide
(a) Atomic structure of a single layer of TiSe2. In bulk TiSe2 the layer spacing is c as indicated. (b) Brillouin zones of the (1 × 1) and (2 × 2) structure outlined in black and red, respectively. (c) A reflection high-energy electron diffraction pattern after film growth. (d) Core-level scans taken with 100 eV photons. (e) ARPES maps taken from a single layer of TiSe2 along the 
direction for the (1 × 1) normal phase at room temperature and the (2 × 2) CDW phase at 10 K. All data were taken with 58 eV photons. (f) Calculated DFT band structure of the (1 × 1) and (2 × 2) phases with the HSE hybrid functional.
