Electronic Densities of States and Surface Segregation in Alloys

  • P. Lambin
  • J. P. Gaspard


A theory of surface segregation in transition metal alloys is investigated. In this theory, the segregation energy is deduced from the electronic d densities of states. The alloy is described in a tight binding approximation using the moments method. A particular application to CuNi alloys is presented. A systematic prediction of surface segregation is made on the basis of the d electrons per atom ratio of the components of the alloy. A good agreement with experimental results is found except for the 3-d series. The addition of the correlation energy removes the discrepancy.


Moment Method Surface Segregation Continue Fraction Expansion Surface Band Tight Binding Approximation 
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Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • P. Lambin
    • 1
  • J. P. Gaspard
    • 1
  1. 1.B5, Institut de PhysiqueUniversité de LiègeLiège 1Belgium

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