Orientational order in xenon fluid monolayers on single crystals of exfoliated graphite

Creators: Nagler, S. E.; Horn, P. M.; Rosenbaum, T. F.; Birgeneau, R. J.; Sutton, M.; Mochrie, S. G. J.; Moncton, D. E.; Clarke, Roy

Abstract

The melting transition of Xe monolayers adsorbed on a single-crystal exfoliated graphite substrate has been studied by high-resolution synchrotron x-ray scattering. At temperatures slightly above the melting transition the fluid phase has a high degree of orientational order. The results are discussed in the context of current theories of two-dimensional melting including the effects of the substrate.

Additional Information

© 1985 The American Physical Society. Received 3 December 1984. It is a pleasure to acknowledge valuable discussions and exchange of information with R. Bruinsma, C. Herring, P. Dimon, S. Fain, G. Grinstein, D. Nelson, E. D. Specht, and A. Novaco. We would also like to thank H. Homma for the preparation of intercalate graphite samples. This work was partially done at the Stanford Synchrotron Radiation Laboratory which is supported by the U.S. Department of Energy Office of Basic Energy Sciences. One of us (S.E.N.) was supported by the Natural Sciences and Engineering Research Council of Canada. T.F.R. was supported by the Materials Research Laboratory Program of the National Science Foundation at the University of Chicago under Grant No. 82-16892. The MIT collaborators were supported by the Joint Services Electronics Program under Contract No. DAAG-29-83-K0003 and by the National Science Foundation Materials Research Laboratory under Contract No. DMR-81-19295. R.C. was supported by National Science Foundation Low Temperature Physics Grant No. DMR-84-04975. Work at Brookhaven National Laboratory was supported by the U. S. Department of Energy under Contract No. DE-AC02-76-CH00016.

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