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Stability and work function of TiC_xN_(1-x) alloy surfaces: Density functional theory calculations

机译:TiC_xN_(1-x)合金表面的稳定性和功函数:密度泛函理论计算

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摘要

Critical factors that control the vacuum work function of the TiC_xN_(1-x) ternary system surfaces were determined using detailed density functional theory calculations. Surface chemistry (i.e., orientation, stoichiometry, and defect density) was found to play the most important role in determining the work function value, far surpassing the impact of alloy composition (i.e., x value) on the work function. In general, Ti-deficient surfaces display larger work functions. Work function tuning may thus be effectively accomplished by controlling the surface chemistry rather than the composition.
机译:使用详细的密度泛函理论计算确定了控制TiC_xN_(1-x)三元系统表面的真空功函数的关键因素。发现表面化学(即取向,化学计量和缺陷密度)在确定功函数值中起最重要的作用,远远超过合金成分(即x值)对功函数的影响。通常,缺乏钛的表面显示出较大的功函数。因此,可以通过控制表面化学而不是组成来有效地完成功函数调节。

著录项

  • 来源
    《Physical review》 |2009年第20期|201406.1-201406.4|共4页
  • 作者

    H. Zhu; M. Aindow; R. Ramprasad;

  • 作者单位

    Department of Chemical, Materials and Biomolecular Engineering, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269, USA;

    Department of Chemical, Materials and Biomolecular Engineering, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269, USA;

    Department of Chemical, Materials and Biomolecular Engineering, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269, USA;

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

    surface double layers, schottky barriers, and work functions; density functional theory, local density approximation, gradient and other corrections;

    机译:表面双层;肖特基势垒和功函数;密度泛函理论;局部密度近似;梯度和其他校正;

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