Abstract

Based on the Pauling's nature of chemical bond, the valence electron structures of diamond, Si and c-BN crystals have been constructed and the relative electron density difference (REDD) between the diamond (1 0 0) plane and 22 planes in Si and c-BN substrate, respectively, have been calculated. The experimental results, that the diamond (1 0 0) film can exclusively grow directly on the (1 0 0) oriented c-BN substrate, have been explained satisfactorily from minimization of the electron density difference across the interface.

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