Charge-density-wave phase transition in 1T-TiSe2:: Excitonic insulator versus band-type Jahn-Teller mechanism -: art. no. 235101
Charge-density-wave phase transition in 1T-TiSe2:: Excitonic insulator versus band-type Jahn-Teller mechanism -: art. no. 235101
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DOI：
10.1103/physrevb.65.235101
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发表时间：
2002-06-15
影响因子：
3.7
通讯作者：
Skibowski, M
中科院分区：
文献类型：
--
作者：
Rossnagel, K;Kipp, L;Skibowski, M
利用同步辐射高分辨角分辨光电子能谱研究了电荷密度波相变对1 T-TiSe_2电子结构的影响。我们发现，硒4p型价带最大值在伽马和钛3d型导带最小值在L冷却后降低。我们的光电子能谱结果解释了在传输数据中观察到的异常，并且似乎与带型Jahn-Teller机制而不是激子电子-空穴相互作用一致。
The influence of the charge-density-wave phase transition on the electronic structure of 1T-TiSe2 is studied by means of high-resolution angle-resolved photoemission spectroscopy with synchrotron radiation. We find that both the Se 4p-type valence band maximum at Gamma and the Ti 3d-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.