Fluid and registered phases in the second layer of 3He on graphite
PublisherAmerican Physical Society
Rights accessOpen Access
A quantum Monte Carlo approach, considering all the corrugation effects, was used to calculate the complete phase diagram of the second 3He layer adsorbed on graphite. We found that a first-layer triangular solid was in equilibrium with a gas in the second layer. At a surface density 0.166±0.001Å-2, this fluid changes into two first-layer registered phases: 4/7 and 7/12 solids. The 7/12 arrangement transforms into an incommensurate triangular structure of ¿=0.189±0.001Å-2 upon further helium loading. A recently proposed hexatic phase was found to be unstable with respect to those commensurate solids.
CitationGordillo, M. C., Boronat, J. Fluid and registered phases in the second layer of 3He on graphite. "Physical review. B.", 29 Maig 2018, vol. 97, núm. 20, p. 1-5.