Finite temperature effects in a one-dimensional mott-hubbard insulator: Angle-resolved photoemission study of Na0.96V2O5
Finite temperature effects in a one-dimensional mott-hubbard insulator: Angle-resolved photoemission study of Na0.96V2O5
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一维莫特哈伯德绝缘体中的有限温度效应：Na0.96V2O5 的角分辨光电发射研究
DOI：
10.1103/physrevlett.82.803
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发表时间：
1998
影响因子：
8.6
通讯作者：
S. Maekawa
中科院分区：
文献类型：
--
作者：
K. Kobayashi;T. Mizokawa;A. Fujimori;M. Isobe;Y. Ueda;T. Tohyama;S. Maekawa
我们对一维Mott-Hubbard绝缘体Na_(0.96)V_(2)O_(5)进行了角度分辨光电子能谱研究，发现V_3d下Hubbard带的光谱强烈地依赖于温度。用精确对角化方法计算了有限温度下一维t-J模型的单粒子谱函数，并与实验结果进行了比较。实验结果与理论结果吻合较好。根据自旋带“费米面”的存在，讨论了强的有限温度效应。
We have made an angle-resolved photoemission study of a one-dimensional (1D) Mott-Hubbard insulator Na_{0.96}V_{2}O_{5} and found that the spectra of the V 3d lower Hubbard band are strongly dependent on the temperature. We have calculated the one-particle spectral function of the one-dimensional t-J model at finite temperatures by exact diagonalization and compared them with the experimental results. Good overall agreement is obtained between experiment and theory. The strong finite temperature effects are discussed in terms of the existence of the ``Fermi surface'' of the spinon band.