He-3 on preplated graphite
Tipus de documentArticle
EditorAmerican Physical Society
Condicions d'accésAccés obert
By using the diffusion Monte Carlo method, we obtained the full phase diagram of He3 on top of graphite preplated with a solid layer of He4. All the He4 atoms of the substrate were explicitly considered and allowed to move during the simulation. We found that the ground state is a liquid of density 0.007±0.001 Å-2, in good agreement with available experimental data. This is significantly different from the case of He3 on clean graphite, in which both theory and experiment agree on the existence of a gas-liquid transition at low densities. Upon an increase in He3 density, we predict a first-order phase transition between a dense liquid and a registered 7/12 phase, the 4/7 phase being found metastable in our calculations. At larger second-layer densities, a final transition is produced to an incommensurate triangular phase.
CitacióGordillo, M. C., Boronat, J. He-3 on preplated graphite. "Physical review. B.", 18 Octubre 2016, vol. 94, núm. 16, p. 165421-1-165421-5.
Versió de l'editorhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.94.165421