Domain Structures in Graphite Intercalation Compounds
Domain structures have been proposed for both c-axis ordering (staging) of the intercalant layers, as well as for the in-plane superlattices that exist at low temperatures in alkali metal intercalation compounds. In this paper, the kinetics of domain growth in intercalation compounds is examined theoretically. The simultaneous growth of staged islands of intercalant is calculated for an initially homogeneous, dilute, stage-one compound. Upon quenching, the intercalant atoms cluster within a plane to form islands whose positions in different planes are correlated as a result of the interlayer interaction. The kinetics of island growth for in-plane superlattice structures are also analyzed. It is suggested that in a two-dimensional approximation, kinetically induced disorder may occur in rapidly quenched samples, leading to an amorphous or glassy structure.
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