Abstract

We report on the results of an adsorption isotherm study of multilayer Kr films adsorbed on BN. Measurements were conducted on a computer-controlled adsorption apparatus at 22 temperatures in the vicinity of the bulk-triple point of Kr. The data are compared with those available for Kr on graphite. The phase diagrams for both systems are topologically identical in the region between two and five layers. The layer critical temperatures for the second and third layers are essentially identical for Kr on both substrates; the high-temperature solidification transition of the second layer, on the other hand, is shifted on BN relative to where it occurs on graphite. The implications of our results for the current understanding of re-entrant layering are discussed.

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