ELECTROMIGRATION OF SUBSTITUTIONAL IMPURITIES IN METALS - THEORY AND APPLICATION IN AL AND CU

Article

关键词: INTERSTITIAL GREEN-FUNCTIONS;    TRANSITION-METALS;    RESIDUAL RESISTIVITY;    DILUTE ALLOYS;    SCATTERING;    NIOBIUM;    AG;    NB;    PD;   

DOI  :  10.1103/PhysRevB.52.8794

来源: SCIE

【 摘 要 】

A theory describing scattering of Bloch electrons by an atom halfway along its path towards a neighboring vacancy is cast in a computationally convenient form. This allows for the computation of the electromigration wind force at the saddle-point position in an elementary diffusion step, where the cross section for Bloch electron-impurity scattering of the migrating ion is at a maximum. Results for atoms migrating into a neighboring vacancy in Al and Cu are presented. The outcome is found to be consistent with experimental information, even though only a two-atom cluster was embedded in the host metal. It is concluded that even more realistic calculations of the electromigration wind force on substitutional impurities in metals are possible upon incorporation of the effects of local lattice deformation and charge transfer.

【 授权许可】

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