SEGREGATION AND THE WORK FUNCTION OF A RANDOM ALLOY - PDAG(111)

被引：17

作者：

CRAMPIN, S ^{[1
]}

机构：

[1] CATHOLIC UNIV NIJMEGEN,INST THEORET PHYS,6525 ED NIJMEGEN,NETHERLANDS

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1993年 / 5卷 / 36期

关键词：

D O I：

10.1088/0953-8984/5/36/003

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Self-consistent parameter-free calculations of the surface electronic structure of a random alloy are used to discuss the compositional dependance of the work function (PHI) of the PdAg(111) random alloy surface. For crystals with uniform concentration profile PHI varies almost linearly between the pure metal limits, and in the presence of segregation is found to be a measure of the surface layer composition. Good agreement with measured polycrystalline work functions is found using experimentally determined segregation data. The results are used to understand screening within PdAg alloys and point to possible surface-alloy formation during the growth of Pd on Ag.

引用

页码：L443 / L448

页数：6

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