Second layer of H2 and D2 adsorbed on graphene

Abstract

We report diffusion Monte Carlo calculations on the phase diagrams of para-H2 and ortho-D2 adsorbed on top of a first layer of the same substances on graphene. We found that the ground state of the second layer is a triangular incommensurate solid for both isotopes. The densities for promotion to a second layer and for the onset of a two-dimensional solid on that second layer compare favorably to available experimental data in both cases.

6 pages, to be published in Phys. Rev. B

References in corpus (8)

• Electric Field Effect in Atomically Thin Carbon Films
• Two Dimensional Atomic Crystals
• Phase diagram of 4He adsorbed on graphite
• 4He on a single graphene sheet
• Supersolidity in quantum films adsorbed on graphene and graphite
• Phase diagram of H2 adsorbed on graphene
• Two-dimensional molecular para-hydrogen and ortho-deuterium at zero temperature
• Phase transitions of H2 adsorbed on the surface of single carbon nanotubes

Cited by in corpus (4)

• Supersolidity in the second layer of $para$-H${}_2$ adsorbed on graphite
• Adsorption of parahydrogen on graphene
• Phases of ${}^4$He and H${}_2$ adsorbed on a single carbon nanotube
• H2 superglass on an amorphous carbon substrate