Band dispersion of quasi-single crystal thin film phase pentacene monolayer studied by angle-resolved photoelectron spectroscopy
Band dispersion of quasi-single crystal thin film phase pentacene monolayer studied by angle-resolved photoelectron spectroscopy
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DOI：
10.1063/1.3232205
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发表时间：
2009-09
影响因子：
4
通讯作者：
M. Ohtomo;Tadamasa Suzuki;T. Shimada;T. Hasegawa
中科院分区：
文献类型：
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作者：
M. Ohtomo;Tadamasa Suzuki;T. Shimada;T. Hasegawa
使用130 K下的角分辨光电子能谱研究了在阶梯聚束3×3 Bi-Si(111)上外延生长的薄膜相并五苯的分子间能带色散。我们使用二维紧束缚拟合实验色散来评估转移积分，并发现在Γ-M方向上的相邻分子具有最强的耦合，如预测的那样。价带顶部的估计有效质量是各向同性的，范围在电子质量的 0.8 到 1.0 之间。
Intermolecular band dispersion of thin film phase pentacene grown epitaxially on step-bunched 3×3 Bi–Si(111) was investigated using angle resolved photoemission spectroscopy at 130 K. We evaluated the transfer integrals using two-dimensional tight-binding fit to the experimental dispersion and found that adjacent molecules in Γ-M direction have the strongest coupling as predicted. The estimated effective mass at the top of the valence band was isotropic and ranged between 0.8 and 1.0 of the electron mass.