Electronic Structure And Anomalous Photoemission Line-shape of Quasi-2d Oxide η-mo_4o_(11)

M.A. Valbuena; J. Avila; S. Drouard; H. Guyot; M.C. Asensio

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Electronic Structure And Anomalous Photoemission Line-shape of Quasi-2d Oxide η-mo_4o_(11)

机译：准2d氧化物η-mo_4o_（11）的电子结构和反常光发射线型

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The η-Mo_4O__(11) compound is a layered two-dimensional (2D) metallic system whose reduced dimensionality originates non-linear properties as charge density wave (CDW) instabilities. We report on synchrotron radiation angle resolved photoemission spectroscopy (ARPES) measurements in order to obtain a detailed picture of the electronic structure of this material. The symmetry of the states near the Fermi level (E_F) has been discussed in relation to the photoemission symmetry selections rules. Our results are in excellent agreement with previous tight-binding calculations and support the hidden nesting concept proposed to explain the CDW instabilities exhibited by this family of compounds. In addition, a very peculiar photoemission line-shape has been found with the presence of localized non-dispersive states. Some possible explanations are discussed.

机译：η-Mo_4O__（11）化合物是层状二维（2D）金属系统，其减小的尺寸会由于电荷密度波（CDW）不稳定性而产生非线性特性。我们报告同步加速器辐射角分辨光发射光谱（ARPES）测量结果，以获得该材料的电子结构的详细图片。关于光发射对称性选择规则，已经讨论了费米能级（E_F）附近状态的对称性。我们的结果与以前的紧密结合计算非常吻合，并支持提出隐藏的嵌套概念以解释该化合物家族表现出的CDW不稳定性。另外，已经发现具有局部非分散态的非常特殊的光发射线形。讨论了一些可能的解释。

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来源
《Applied Surface Science》 |2007年第1期|p.40-44|共5页
作者
M.A. Valbuena; J. Avila; S. Drouard; H. Guyot; M.C. Asensio;
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作者单位

Instituto de Ciencia de Materiales de Madrid (ICMM). CSIC, 28049 Madrid, Spain;

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原文格式 PDF
正文语种 eng
中图分类应用物理学;
关键词
photoelectron spectroscopies; charge density waves; electronic structure; low-dimensional solids;

机译：光电子能谱;电荷密度波;电子结构;低维固体;

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Electronic Structure And Anomalous Photoemission Line-shape of Quasi-2d Oxide η-mo_4o_(11)

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