Charge-density-wave phase transition in Excitonic insulator versus band-type Jahn-Teller mechanism
- 21 May 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 65 (23), 235101
- https://doi.org/10.1103/physrevb.65.235101
Abstract
The influence of the charge-density-wave phase transition on the electronic structure of is studied by means of high-resolution angle-resolved photoemission spectroscopy with synchrotron radiation. We find that both the Se -type valence band maximum at and the Ti -type conduction band minimum at L are lowered upon cooling. Our photoemission results explain the observed anomalies in the transport data and appear to be consistent with the band-type Jahn-Teller mechanism rather than with excitonic electron-hole interaction.
Keywords
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