Structure, superfluidity, and quantum melting of hydrogen clusters
| dc.creator | Mezzacapo, Fabio | |
| dc.creator | Boninsegni, Massimo | |
| dc.date | 2006-11-30 | |
| dc.date | 2007-03-14 | |
| dc.date.accessioned | 2026-07-07T07:51:35Z | |
| dc.date.available | 2026-07-07T07:51:35Z | |
| dc.description | We present results of a theoretical study of para-hydrogen and ortho-deuterium clusters at low temperature (0.5 K < T < 3.5 K), based on Path Integral Monte Carlo simulations. Clusters of size up to N=21 para-hydrogen molecules are nearly entirely superfluid at T < 1 K. For 21 < N < 30, the superfluid response displays strong variations with N, reflecting structural changes that occur on adding or removing even a single molecule. Some clusters in this size range display quantum melting, going from solid- to liquid-like as T tends to 0. Melting is caused by quantum exchanges of molecules. The largest para-hydrogen cluster for which a significant superfluid response is observed comprises 27 molecules. Evidence of a finite superfluid response is presented for ortho-deuterium clusters of size up to 14 molecules. Magic numbers are observed, at which both types of clusters feature pronounced stability. | |
| dc.description | 11 pages, 16 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0611775 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0611775 | |
| dc.identifier | Phys. Rev. A 75, 033201 (2007) | |
| dc.identifier | doi:10.1103/PhysRevA.75.033201 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/125567 | |
| dc.subject | Statistical Mechanics | |
| dc.title | Structure, superfluidity, and quantum melting of hydrogen clusters | |
| dc.type | text |