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Ordering and Energetics of Hg Overlayers on Cu(O01)

  • C.W. Hutchings (a1), P.A. Dowben (a1), Y.J. Kime (a1), W. Li (a1), M. Karimi (a2), C. Moses (a3) and G. Vidali (a1)...

Abstract

The growth, ordering, and energetics of Hg overlayers on Cu(O01) have been studied using atom beam scattering, LEED and angle-resolved photoemission. Two stable ordered phases have been identified: one phase is a c(2↑2) and the other phase is a higher density square lattice which has a coincidence c(4↑4) structure. A phase diagram has been determined using LEED and atom beam diffraction data for surface temperatures between 180 and 330 K. ABS data suggest out that there is a narrow coexistance region between these two phases. The isosteric heat of adsorption has been determined as a function of coverage.

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[1] See, for example: Fan, J.C.C. and Poate, J.M., Eds., Heteroepitaxy on Silicon, MRS Symposia Proceedings, v. 67, 1986.
[2] Heinz, K., Progr.Surf.Science 27, 239 (1988); W.N. Unertl, Comments Cond.Mat.Phys. 12, 289 (1987); P.A. Dowben, M. Onellion, and Y.J. Kime, Scann. Microsc. 2, 177 (1988).
[3] Singh, N.K. and Jones, R.G., Chem.Phys.Lett. 155, 463 (1989); R.G. Jones and A.W.L.-Tong, Surf.Sci. 188, 87 (1987); R.G. Jones and D.L. Perry, Vacuum, 31, 493 (1981); P.A. Dowben, S. Varma, D.R. Muller, and M. Onellion, Z. Physik B73, 247 (1988) and references therein.
[4] Vidali, G. and Hutchings, C.W., Phys.Rev. B37, 10374 (1988).
[5] Dowben, P.A., Kime, Y.J., Hutchings, C.W., Li, W., and Vidali, G., Surf.Sci. in press.
[6] Vidali, G., Hutchings, C.W., Dowben, P.A., Karimi, M., Moses, C., and Foresti, M., in Proceedings of the 36th American Vacuum Society Meeting (Boston, 1989); C.W. Hutchings, W. Li, M. Karimi, C. Moses, P.A. Dowben and G. Vidali, in preparation.
[7] Dowben, P.A., Kime, Y.J., LaGraffe, D., and Onellion, M., to appear in Surf. and Int. Analy. 15 (1990); M. Onellion, Y.J. Kime, P.A. Dowben, and N. Tache, J.Phys.C: Solid State, 20, L633 (1987).

Ordering and Energetics of Hg Overlayers on Cu(O01)

  • C.W. Hutchings (a1), P.A. Dowben (a1), Y.J. Kime (a1), W. Li (a1), M. Karimi (a2), C. Moses (a3) and G. Vidali (a1)...

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