Optical signatures of thiolate/Cu(110) and S/Cu(110) surface structures

D. S. Martin, P. D. Lane, G. E. Isted, R. J. Cole, N. P. Blanchard

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The optical properties of thiolate/Cu(110) and S/Cu(110) surfaces created by the adsorption of methanethiol and L-cysteine are investigated using reflection anisotropy spectroscopy (RAS). We find that characteristic optical signatures are obtained from these systems. The experimental RAS profiles are simulated using a four-phase model consisting of vacuum, anisotropic overlayer, anisotropic surface, and isotropic substrate. The results of the simulations suggest that a broad optical transition at 3.8 eV is associated with the thiolate/Cu (110) interface, consistent with recent first-principles calculations [S. D'Agostino et al., Phys. Rev. B 75, 195444 (2007)].

Original languageEnglish
Article number075428
Pages (from-to)-
Number of pages6
JournalPhysical review B: Condensed matter and materials physics
Issue number7
Publication statusPublished - 27 Aug 2010

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