Charge-density-wave phase transition in1T−TiSe2: Excitonic insulator versus band-type Jahn-Teller mechanism
作者： K. Rossnagel , L. Kipp , M. Skibowski
DOI: 10.1103/PHYSREVB.65.235101
关键词: Inverse photoemission spectroscopy 、 Atomic physics 、 Photoemission spectroscopy 、 Synchrotron radiation 、 Condensed matter physics 、 Charge density wave 、 Phase transition 、 Angle-resolved photoemission spectroscopy 、 Jahn–Teller effect 、 Electronic structure 、 Physics
摘要: The influence of the charge-density-wave phase transition on electronic structure $1T\ensuremath{-}{\mathrm{TiSe}}_{2}$ is studied by means high-resolution angle-resolved photoemission spectroscopy with synchrotron radiation. We find that both Se $4p$-type valence band maximum at $\ensuremath{\Gamma}$ and Ti $3d$-type conduction minimum L are lowered upon cooling. Our results explain observed anomalies in transport data appear to be consistent band-type Jahn-Teller mechanism rather than excitonic electron-hole interaction.
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