Quasi-2D Liquid He-3
Other Condensed Matter
2013-07-26 v2 Statistical Mechanics
Abstract
Quantum Monte Carlo simulations at zero temperature of an ensemble of He-3 atoms adsorbed on Mg and Alkali substrates yield strong evidence of a thermodynamically stable liquid He-3 monolayer on all Alkali substrates, with the possible exception of Li. The effective 2D density is close to 0.02$ inverse square Angstroms on Na, making it the lowest density liquid in Nature. Its existence is underlain by zero-point atomic motion perpendicular to the substrate, whose effect is softening the short-range repulsion of the helium interatomic potential. The monolayer films should turn superfluid at a temperature of order 1 mK. No liquid film is predicted to form on Mg, or on stronger substrates such as graphite.
Cite
@article{arxiv.1304.6342,
title = {Quasi-2D Liquid He-3},
author = {Michele Ruggeri and Saverio Moroni and Massimo Boninsegni},
journal= {arXiv preprint arXiv:1304.6342},
year = {2013}
}
Comments
Three figures in color