Abstract
Deuterium physisorbed on exfoliated graphite preplated by a krypton monolayer has been investigated by heat–capacity measurements in the complete submonolayer coverage range up to the initial stages of bilayer film formation. A detailed phase diagram has been mapped out. The commensurate \(\left( {1x{\text{1}}} \right)\left[ {\frac{1}{2}} \right]\) phase covering most part of the phase diagram in the submonolayer region exhibits two–dimensional (2D) Ising symmetry. At the commensurate–incommensurate transition a reentrant fluid phase extending down to 1.5 K has been found, which confirms theoretical predictions.
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Wiechert, H., Kortmann, K. Ordering and Phase Transitions in Deuterium Monolayers Physisorbed on Krypton Preplated Graphite. Journal of Low Temperature Physics 111, 561–568 (1998). https://doi.org/10.1023/A:1022293316065
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DOI: https://doi.org/10.1023/A:1022293316065