He-3 on preplated graphite
Tipo de documentoArtículo
Fecha de publicación2016-10-18
EditorAmerican Physical Society
Condiciones de accesoAcceso abierto
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.
CitaciónGordillo, M. C., Boronat, J. He-3 on preplated graphite. "Physical review. B.", 18 Octubre 2016, vol. 94, núm. 16, p. 165421-1-165421-5.
Versión del editorhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.94.165421