Electron-hole coupling and the charge density wave transition in TiSe2.
作者： T. E. Kidd , T. Miller , M. Y. Chou , T.-C. Chiang
DOI: 10.1103/PHYSREVLETT.88.226402
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摘要: Angle-resolved photoemission is employed to measure the band structure of TiSe2 in order clarify nature ( 2 x 2) charge density wave transition. The results show a very small indirect gap normal phase transforming into larger at different location Brillouin zone. Fermi surface topology irrelevant this case. Instead, electron-hole coupling together with novel Jahn-Teller effect drives
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