Electronic Theory of Surface Segregation in Binary Alloys:Coherent Potential Approximation

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概要

• 論文の詳細を見る

• A theory for surface segregation is presented on the assumption that the electroniccontribution to the free energy plays the dominant role to determine the alloy corn-position near the surface. The electronic energy is calculated on the basis of the tightbinding model. The presence of the surface, the alloy disorder and the random poten-tials due to the surface segregation are treated by using an extension of the coherentpotential approximation for a bulk alloy to a semi-infinite case. The alloy composi-lion on each layer is self-consistently determind so as to give the minimum of the totalfree energy. For the purpose of investigating essential factors determining the segrega-lion, the formulation is applied to the (001) surface of simple cubic crystal and thenumerical results are presented.

• 社団法人日本物理学会の論文
• 1987-04-15

著者

• ISHIDA Ikuji

  Department of Physics, Kyoto University

• Ishida I

  Faculty Of Integrated Arts And Sciences Hiroshima University

• ISHIDA Ikuji

  Faculty of Integrated Arts and Sciences,Hiroshima University

関連論文

• Electronic State of Metal Surface with Random Distribution of Atoms
• Note on Vibrations of a Chain with Glass-Like Disordor
• Electronic Theory of Surface Segregation in Binary Alloys:Coherent Potential Approximation

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