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Faculty Publications

University of Northern Iowa

2002

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Full-Text Articles in Physics

Electron-Hole Coupling And The Charge Density Wave Transition Intise2, T. E. Kidd, T. Miller, M. Y. Chou, T.-C. Chiang Jun 2002

Electron-Hole Coupling And The Charge Density Wave Transition Intise2, T. E. Kidd, T. Miller, M. Y. Chou, T.-C. Chiang

Faculty Publications

Angle-resolved photoemission is employed to measure the band structure of TiSe2 in order to clarify the nature of the (2 × 2 × 2) 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.