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Interactions between Fermi surfaces and Brillouin zone boundaries and phase stability of embedded metallic nanoparticles

机译:费米表面与布里渊区边界之间的相互作用以及嵌入的金属纳米粒子的相稳定性

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摘要

A general approach is outlined to predict the chemical compositions of solute nanoclusters embedded in materials with nearly free electrons. Based on the experimental results of the two-dimensional angular correlation of positron annihilation radiation and the corresponding theoretical calculations, we show that the Fermi surface (FS)-Brillouin zone interaction is a key to understand the chemical composition realized in solute nanoclusters because the presence of FS necks at zone boundaries causes a reduction in electron energy due to the band-gap effect.
机译:概述了一种通用方法来预测嵌入几乎具有自由电子的材料中的溶质纳米团簇的化学组成。基于正电子an灭辐射二维角相关性的实验结果和相应的理论计算,我们表明费米表面(FS)-布里渊区相互作用是理解溶质纳米团簇中实现的化学组成的关键由于带隙效应,在区域边界处的FS颈的弯曲会导致电子能量的降低。

著录项

  • 来源
    《Physical review》 |2009年第20期|201405.1-201405.4|共4页
  • 作者单位

    The Oarai Center, Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313, Japan Studiecentrum voor Kernenergie-Centre d'Etude de VEnergie Nucleaire (SCK-CEN), Boeretang 200, B-2400 Mol, Belgium;

    The Oarai Center, Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313, Japan;

    Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan Key Laboratory of Polar Materials and Devices (Ministry of Education of China), East China Normal University, Shanghai 200241, People's Republic of China;

    The Oarai Center, Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313, Japan;

    The Oarai Center, Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313, Japan;

    Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan Cyclotron and Radioisotope Center, Tohoku University, Sendai 980-8578, Japan;

    Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-0033, Japan;

    Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-0033, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    electronic structure of nanoscale materials: clusters; nanoparticles; nanotubes; and nanocrystals; fermi surface: calculations and measurements; effective mass; G factor; positron annihilation;

    机译:纳米级材料的电子结构:簇;纳米粒子纳米管和纳米晶体;费米表面:计算和测量;有效质量G因子;正电子an灭;

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