Electron-hole coupling and the charge density wave transition in TiSe2

Citation:
Kidd, TE, Miller T, Chou MY, Chiang TC.  2002.  Electron-hole coupling and the charge density wave transition in TiSe2, Jun. Physical Review Letters. 88:4., Number 22

Abstract:

Angle-resolved photoemission is employed to measure the band structure of TiSe2 in order to clarify the nature of the (2x2x2 ) charge density wave transition. The results show a very small indirect gap in the normal phase transforming into a larger indirect gap at a different location in the Brillouin zone. Fermi surface topology is irrelevant in this case. Instead, electron-hole coupling together with a novel indirect Jahn-Teller effect drives the transition.

Notes:

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