Vibrational modes of a finite simple-cubic bicrystal. II

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Abstract
The normal-mode frequencies of a finite simple-cubic Rosenstock-Newell bicrystal with a coherent planar interface are evaluated and analysed as functions of the relative thickness of the component subcrystals using three different general boundary conditions. The calculation was performed using the matrix reduction formalism developed for finite-layered structures. The result obtained includes details of earlier work based on a different method as a special case. It also provides some additional insights into the characteristics of vibrational modes in a finite bicrystal, such as the existence condition for a 'localised-localised' (LL) interface mode.