Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 58: Poster Session III (Solid/liquid interfaces; Metals; Semiconductors; Oxides and insulators)

O 58.13: Poster

Mittwoch, 28. März 2012, 18:15–21:45, Poster B

Anisotropic Change in Surface Resistance upon Adsorption of Oxygen on Cu(110) as observed by IRRAS — •Jan Pischel, Olaf Skibbe, and Annemarie Pucci — Kirchhoff-Institut für Physik, Im Neuenheimer Feld 227, D-69120 Heidelberg

Adsorbate induced changes in the electrical conductivity of thin metal films are of great interest because of their importance in technological applications, e.g. microelectronic devices. By developping the concept of surface friction between conduction electrons and adsorbate, Persson showed that changes in surface resistance will result in a broadband infrared absorption feature in the case of reflection experiments with p-polarized radiation [1]. Taking advantage of that fact, Otto et al. showed that on the highly anisotropic Cu(110) surface, interaction between conduction electrons and adsorbates settling on top of the close-packed rows of the surface is restricted to the case where the plane of incidence is parallel to these rows [2].

Tying in with these findings, we investigated the anisotropic change in surface resistance induced by formation of the (2×1)O-Cu(110) Added-Row reconstruction, where involvement of the second layer lead to a non-vanishing change in surface resistance also in the case of perpendicular orientation of the plane of incidence with respect to the rows.

[1] B. N. J. Persson. Phys. Rev. B, 44:3277-3296, 1991.

[2] A. Otto et al. New J. Phys., 9:288, 2007.