Fig. 2
From: Ultrafast charge ordering by self-amplified exciton–phonon dynamics in TiSe2
Atomic structure and electronic properties of 1T-TiSe\({}_{2}\). a Top view and b side view of the atomic structure of 1T-TiSe\({}_{2}\). The silver, yellow and orange spheres denote the Ti atoms, the Se atoms on the bottom layer and the Se atoms on the top layer, respectively. The blue and the red arrows denote the PLD displacements {\({{\bf{d}}}_{i}\)} of the Ti and Se atoms, respectively. c Brillouin zones (BZ) of TiSe\({}_{2}\). The solid red lines and blue dash lines denote the BZ of the \(2\times 2\) and \(1\times 1\) cell, respectively. {\(\Gamma\), M, K} and {\(\bar{\Gamma }\), \(\bar{{\rm{M}}}\), \(\bar{{\rm{K}}}\)} denote the special \(k\) points in \(1\times 1\) and \(2\times 2\) BZ, respectively. Effective band structures (EBS) of the d normal state with \(U=0\) eV (dots) and \(U=3.5\) eV (dashed lines) and e CDW state. The plots in shaded areas in (d) and (e) are ARPES spectra reproduced from ref. 63. The Fermi level is shifted to the experimental value.
