Quasiperiodic layers of free-electron metals studied using electron diffraction

A. K. Shukla; R. S. Dhaka; S. W. DSouza; Sanjay Singh; D. Wu; T. A. Lograsso; M. Krajci; J. Hafner; K. Horn; S. R. Barman

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Quasiperiodic layers of free-electron metals studied using electron diffraction

机译：使用电子衍射研究自由电子金属的准周期层

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Using electron diffraction, we show that free-electron metals, such as sodium and potassium, form a highly regular quasiperiodic monolayer on the fivefold surface of icosahedral Al-Pd-Mn and that the quasiperiodicity propagates up to the second layer in sodium. Our photoelectron spectroscopy results show that the quasicrys-talline alkali-metal adlayer does not exhibit a pseudogap near the Fermi level thought to be characteristic for the electronic structure of quasicrystalline materials. Calculations based on density functional theory provide a model structure for the quasicrystalline alkali-metal monolayer and confirm the absence of a pseudogap.

机译：使用电子衍射，我们显示诸如钠和钾的自由电子金属在二十面体Al-Pd-Mn的五重表面上形成高度规则的准周期性单层，并且准周期性传播到钠中的第二层。我们的光电子光谱结果表明，准滑石碱金属金属层在费米能级附近没有假间隙，而费米能级被认为是准晶体材料电子结构的特征。基于密度泛函理论的计算为准晶体碱金属单层提供了模型结构，并确定了不存在伪间隙。

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来源
《Physical review》 |2009年第13期|340-344|共5页
作者
A. K. Shukla; R. S. Dhaka; S. W. DSouza; Sanjay Singh; D. Wu; T. A. Lograsso; M. Krajci; J. Hafner; K. Horn; S. R. Barman;
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UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore 452001, India;

UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore 452001, India;

UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore 452001, India;

UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore 452001, India;

Ames Laboratory U.S. DOE, Iowa State University, Ames, Iowa 50011-3020, USA;

Ames Laboratory U.S. DOE, Iowa State University, Ames, Iowa 50011-3020, USA;

Institute of Physics, Slovak Academy of Sciences, SK-84511 Bratislava, Slovak Republic Center for Computational Materials Science, Universitdt Wien, A-1090 Wien, Austria;

Center for Computational Materials Science, Universitdt Wien, A-1090 Wien, Austria;

Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195 Berlin, Germany;

UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore 452001, India;

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adsorbed layers and thin films; surface states; band structure; electron density of states; quasicrystals;

机译：吸附层和薄膜;表面状态带结构;状态电子密度准晶体;

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7. Quasiperiodic layers of free-electron metals studied using electron diffraction [O] . Shukla A. K., Dhaka R. S., Du27Souza S. W., 2009

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Quasiperiodic layers of free-electron metals studied using electron diffraction

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