Repulsive interaction of the helium atom with a metal surface
Repulsive interaction of the helium atom with a metal surface
复制标题
氦原子与金属表面的排斥相互作用
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
C. Umrigar
中科院分区：
文献类型：
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作者：
M. Manninen;J. Nørskov;M. Puska;C. Umrigar
表面上氦散射势的斥力部分与表面电子密度近似成正比。比例系数是一个定义良好的量，它与电子-氦散射长度有关。在文献中提出的比例常数值的扩散是由于系数的不同定义或由于不充分的计算方法。利用局部密度近似和自相互作用校正计算的值与电子散射长度的测量值非常吻合。
The repulsive part of the helium scattering potential at a surface is approximately proportional to the surface electron density. The proportionality coefficient is shown to be a well-defined quantity, which can be related to the electron-helium scattering length. The spread in the values of the proportionality constant suggested in the literature is shown to be due to different definitions of the coefficient or due to inadequate calculational methods. The value calculated using the local density approximation with a self-interaction correction is in very good agreement with the electron-scattering-length measurements.