AVS 50th International Symposium
    Surface Science Wednesday Sessions
       Session SS2-WeM

Paper SS2-WeM3
Interactions Mediated by Surface States: Lines and Ordered Overlayers@footnote 1@

Wednesday, November 5, 2003, 9:00 am, Room 327

Session: Surface and Interface Structure: Metals
Presenter: T.L. Einstein, University of Maryland, College Park
Authors: P. Hyldgaard, Chalmers University of Technology and Göteborg University, Sweden
T.L. Einstein, University of Maryland, College Park
Correspondent: Click to Email
Since surface states on (111) noble metals are free-electron like, their propagators can be evaluated analytically.@footnote 2@ Since they are well-screened, one can use simple tight-binding formalism@footnote 3@ to study their effects.@footnote 4@ Applications to metallic surface states on semiconductors may also be fruitful. The needed phase shifts can be extracted from experiment.@footnote 2,4@ Hence, we can now make quantitative predictions of indirect interactions---at least the asymptotically dominant contribution from surface states.@footnote 2,4@ Here, we discuss the interactions of linear defects, relating them to the interactions of (n x 1) ordered overlayers and to the constituent pair and trio interactions. We discuss implications for step-step interactions (on vicinal surfaces), for extracting pair interactions from first-principles calculations of ordered overlayers or from experiments, and for atoms approaching large clusters. @FootnoteText@ @footnote 1@PH supported by ATOMICS, financed by the Swedish Foundation for Strategic research; TLE supported by NSF Grants EEC-0085604 and MRSEC DMR 00-80008. @footnote 2@ J. Repp et al., Phys. Rev. Lett. 85 (2000) 2981; P. Hyldgaard and M. Persson, J. Phys.: Condens. Matt. 12 (2000) L13.@footnote 3@ T.L. Einstein, in Handbook of Surface Science, vol. 1, ed. W.N. Unertl (Elsevier, Amsterdam, 1996), chap. 11.@footnote 4@ P. Hyldgaard and T.L. Einstein, Europhys. Lett. 59 (2002) 265; Surf. Sci., in press [doi:10.1016/S0039-6028(03)00173-0].