Abstract
The microscopic character of melting for quasi–two dimensional N 2 adlayers on graphite is examined for surface densities 0.2 ≤ ρ ≤ 1, where the upper limit corresponds to a complete monolayer. A Monte Carlo method, with the multiple histogram procedure, is employed to determine various thermodynamic quantities. Using the calculated specific heats and selected order parameters, determined at various surface densities, the mechanism for melting is shown to be vacancy mediated. The somewhat unusual behavior of the melting temperature versus density is shown to be entirely due to the vacancy concentration and their topology. Because this is determined by the free energy, our analysis should be general. Preliminary results for Xe on graphite supports this claim.
Similar content being viewed by others
REFERENCES
R. D. Diehl and S. Fain, J. Chem. Phys. 77, 5065 (1982).
R. D. Diehl and S. C. Fain, Jr., Surf. Sci. 125, 116 (1983).
R. D. Diehl, M. F. Toney, and S. C. Fain, Jr., Phys. Rev. Lett. 48, 177 (1982).
R. D. Diehl and S. C. Fain, Jr., Phys. Rev. B 26, 4785 (1982).
H. You and S. C. Fain, Jr., Faraday Disc. Chem. Soc. 80, 159 (1985).
M. H. Chan, A. D. Migone, K. D. Miner, and Z. R. Li, Phys. Rev. B 30, 2681 (1984).
T. Chung and G. Dash, Surf. Sci. 66, 559 (1977).
A. Inaba and H. Chihara, Can. J. Chem. 66, 703 (1988).
K. Kjems, L. Passell, H. Taub, J. G. Dash, and A. D. Novaco, Phys. Rev. B 13, 1446 (1976).
W. Brooks, Brookhaven Report 22617 (unpublished).
J. Rouquerol, S. Partyka, and F. Rouquerol, J. Chem. Soc. Faraday Trans. 73, 306 (1977).
J. Piper, J. Morrison, C. Peters, and Y. Ozaki, J. Chem. Soc. Faraday Trans. 79, 2863 (1983).
J. Litzinger and G. Stewart, Ordering in Two Dimensions, ed. by S. Sinha, Elsevier, North Holland (1980) p. 267.
D. Butler, J. Litzinger, G. Steward, and R. Griffiths, Phys. Rev. Lett. 42, 1289 (1979).
T. Chung, Surf. Sci. 87, 348 (1979).
G. Huff and J. Dash, J. Low Temp. Phys. 24, 155 (1976).
R. D. Etters, M. Roth, and B. Kuchta, Phys. Rev. Lett. 65, 3140 (1990); M. Roth and R. D. Etters, Phys. Rev. B 44, 6581 (1991).
V. Joshi and D. Tildesley, Mol. Phys. 55, 999 (1985).
J. Talbot, D. Tildesley, and W. Steele, Faraday Discuss. Chem. Soc. 80, 1 (1985).
A. Ostlund and A. Berker, Phys. Rev. Lett. 42, 843 (1979).
F. Abraham, Phys. Rev. Lett. 28, 7338 (1983); — Phys. Rev. Lett. 29, 2606 (1984).
R. D. Etters, B. Kuchta, and J. Belak, Phys. Rev. Lett. 70, 826 (1983); B. Kuchta and R. D. Etters, Phys. Rev. B 54, 12057 (1996).
A. M. Ferrenberg and R. H. Swendsen, Phys. Rev. Lett. 63, 1195 (1989).
P. Bowen, J. Burke, P. Corsten, K. Crowell, K. Farrel, J. MacDonald, R. MacDonald, A. MacIsaac, P. Poole, and N. Jan, Phys. Rev. B 40, 7439 (1989).
R. Berns and A. van der Avoird, J. Chem. Phys. 72, 6107 (1980).
R. LeSar and R. Gordon, J. Chem. Phys. 84, 5479 (1986).
R. D. Etters, J. Belak, and R. LeSar, Phys. Rev. B 34, 4221 (1986); J. Belak, R. D. Etters, and R. LeSar, J. Chem. Phys. 89, 1625 (1988).
R. D. Etters, V. Chandreskharan, E. Uzan, and K. Kobashi, Phys. Rev. B 33, 8615 (1986).
J. Belak, R. LeSar, and R. D. Etters, J. Chem. Phys. 92, 5430 (1990).
B. Kuchta and R. D. Etters, Phys. Rev. B 36, 3400 (1987).
B. Kuchta and R. D. Etters, J. Chem. Phys. 88, 2793 (1987).
W. A. Steele, J. Phys. (Paris), 38, Colloq. C4, 61 (1978).
W. A. Steele, Surf. Sci. 36, 317 (1973).
W. Carlos and M. Cole, Surf. Sci. 91, 339 (1980).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Etters, R.D., Kuchta, B. The Character of Melting for Simple Molecules Deposited on Graphite. Journal of Low Temperature Physics 111, 271–286 (1998). https://doi.org/10.1023/A:1022271216549
Issue Date:
DOI: https://doi.org/10.1023/A:1022271216549