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Ordering and Energetics of Hg Overlayers on Cu(O01)

Published online by Cambridge University Press:  25 February 2011

C.W. Hutchings
Affiliation:
Syracuse University, Physics Department, Laboratory of Surface and Low temperature Physics, Syracuse, N.Y. 13244-1130
P.A. Dowben
Affiliation:
Syracuse University, Physics Department, Laboratory of Surface and Low temperature Physics, Syracuse, N.Y. 13244-1130
Y.J. Kime
Affiliation:
Syracuse University, Physics Department, Laboratory of Surface and Low temperature Physics, Syracuse, N.Y. 13244-1130
W. Li
Affiliation:
Syracuse University, Physics Department, Laboratory of Surface and Low temperature Physics, Syracuse, N.Y. 13244-1130
M. Karimi
Affiliation:
Alabama A&M University, Physics Department, Normal, Ala.35762
C. Moses
Affiliation:
Utica College, Physics Department, Utica, N.Y. 13502
G. Vidali
Affiliation:
Syracuse University, Physics Department, Laboratory of Surface and Low temperature Physics, Syracuse, N.Y. 13244-1130
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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.

Type
Research Article
Copyright
Copyright © Materials Research Society 1990

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References

[1] See, for example: Fan, J.C.C. and Poate, J.M., Eds., Heteroepitaxy on Silicon, MRS Symposia Proceedings, v. 67, 1986.Google Scholar
[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).CrossRefGoogle Scholar
[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.CrossRefGoogle Scholar
[4] Vidali, G. and Hutchings, C.W., Phys.Rev. B37, 10374 (1988).CrossRefGoogle Scholar
[5] Dowben, P.A., Kime, Y.J., Hutchings, C.W., Li, W., and Vidali, G., Surf.Sci. in press.Google Scholar
[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.Google Scholar
[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).Google Scholar

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