One-dimensional delocalized adsorbate bloch states on a semiconductor surface: C2H4/Si(001)-(2×1)

W. Widdra, A. Fink, S. Gokhale, P. Trischberger, D. Menzel, U. Birkenheuer, U. Gutdeutsch, N. Rösch

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


We report the observation of a 1D molecular adsorbate band structure caused by direct adsorbate-adsorbate interactions on a semiconductor.For ethylene chemisorbed on Si(001)-(2×1) two adsorbate-derived electronic states, 1b3u and 1b2g, are found to delocalize along the Si-Si dimer rows.The corresponding bands can be followed in reciprocal space from the Γ¯ point into the third surface Brillouin zone.Density functional calculations for ethylene adsorbed on a silicon slab reproduce the experimental 1D band structure and allow us to identify the origin of the lateral interactions.

Original languageEnglish
Pages (from-to)4269-4272
Number of pages4
JournalPhysical Review Letters
Issue number19
StatePublished - 1998


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