3He adsorbed on molecular hydrogen surfaces

2024/07/17 by M. C. Gordillo, Gordillo, M. C., J. Boronat +1
Environmental Science · Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Methane Hydrates and Related Phenomena #Other Condensed Matter (cond-mat.other) #Quantum, superfluid, helium dynamics

paper · pdf · doi:10.48550/arxiv.2407.12436

openalex publication_date 2024/07/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Using a diffusion Monte Carlo (DMC) technique, we calculated the phase diagram of 3He adsorbed on a first solid layer of a molecular hydrogen isotope (H2,HD and D2) on top of graphite. The results are qualitatively similar in all cases: a two-dimensional gas spanning from the infinite dilution limit to a second-layer helium density of 0.048 +/- 0.004 Ang^-2. That gas is in equilibrium with a 7/12 commensurate structure, more stable than any incommensurate triangular solid of similar density. These findings are in reasonably good agreement with available experimental data.

Related

• Zero-temperature phase diagram of the second layer of ^{\bf 4}He adsorbed on graphene
• Two-dimensional and novel quasi-two-dimensional quantum liquids
• Thermodynamic Evidence for Density Wave Order in Two Dimensional 4He Supersolid
• Borophane as substrate for adsorption of He-4: A journey across dimensionality
• Fluidity in Domain Walls in Dilute ³He-⁴He Films on Graphite: Possible 1D Fermi Fluid and Dirac Fermions in Helium Film