Journal of Low Temperature Physics

, Volume 41, Issue 5–6, pp 611–628

Superlattice of parahydrogen physisorbed on graphite surface

  • Sujane C. Wang
  • Legesse Senbetu
  • Chia-Wei Woo
Article

DOI: 10.1007/BF00114368

Cite this article as:
Wang, S.C., Senbetu, L. & Woo, CW. J Low Temp Phys (1980) 41: 611. doi:10.1007/BF00114368

We examine the zero-temperature stability of 1/3- and 1/4-coverage superlattices and the liquid phase of parahydrogen physisorbed on graphite by calculating variational ground state energies. A general anisotropic hydrogen-substrate interaction that can be used for both para- and orthohydrogen is first derived by lattice summation. The single-hydrogen Schrödinger equation is solved. Potential parameters are chosen so that the eigenvalue spectrum can be fitted to experimental data. The eigenfunctions are used to form single-particle elements for the many-body wave function. For finite-coverage monolayers of adsorbed hydrogen, the trial wave function is chosen as a product of a properly symmetrized single-particle element and a Feenberg-Jastrow correlating factor. The energies of the liquid and superlattice phases are calculated within the same formalism. We find at 1/3 coverage a stable triangle superlattice. At 1/4 coverage, however, the submonolayer remains in the two-dimensional liquid phase.

Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • Sujane C. Wang
    • 1
  • Legesse Senbetu
    • 1
  • Chia-Wei Woo
    • 1
  1. 1.Department of PhysicsUniversity of California-San DiegoLa JollaUSA

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