Fig. 1: Crystal structure, Fermi surface, and band structure of 1T-TiSe2.
From: Incoherence-to-coherence crossover observed in charge-density-wave material 1T-TiSe2
a Schematic of the crystal structure and the doubling of the unit cell in the CDW state of 1T-TiSe2. b Schematic of the Brillouin zone and Fermi surface of 1T-TiSe2 above and below the CDW transition temperature (Tcdw). c Schematic of the band structure of 1T-TiSe2 along the \(\bar{\Gamma }-\bar{{\rm{M}}}\) direction. Inset panel illustrates the anisotropic band dispersion of the conduction band along the \(\bar{\Gamma }-\bar{{\rm{M}}}\) and \(\bar{{\rm{M}}}-\bar{{{{\rm K}}}}\) directions. d Schematic of the band structure of 1T-TiSe2 near the \(\bar{{\rm{M}}}\)/\(\bar{\Gamma }\) point considering the band folding in the CDW state. e is the same as d, but considering a gap opening between v and c1.
