  We present an investigation on electronic structure of 1T-TiTe2 material via
high-resolution angle-resolved photoemission spectroscopy (ARPES), utilizing
tunable photon energy excitations. The typical semimetal-like electronic
structure is observed and examined, where multiple hole pockets related to Te
5p bands and one electron pockets related to Ti 3d band are populated. The
obtained results reveals i) a pronounced three-dimensional (3D) electronic
structure of 1T-TiTe2 with typical semi-metallic features, for both the Ti 3d
and the Te 5p states; ii) multiple Fermi surface (FS) sheets and complex band
structure; and iii) an obvious kink in dispersion at an energy of about 18 meV
below the Fermi energy, the first experimental observation of a kink structure
in 1T-TiTe2, which may originate from electron-phonon coupling. These important
and significant findings can help us to gain an in-depth understanding of the
3D electronic structure of semimetallic 1T- TiTe2.
