Journal article
Surface state lifetime in quasi-one-dimensional oxygen stripes on Cu(110)
Publication Details
Authors: | Matzdorf, R. |
Publication year: | 2006 |
Journal: | Surface Science |
Pages range : | 2581-2586 |
Volume number: | 600 |
Start page: | 2581 |
End page: | 2586 |
ISSN: | 0039-6028 |
Abstract
Scanning tunneling spectroscopy data on the lifetime and bottom energy of a surface state band in quasi-one-dimensional stripes are presented as a function of stripe width. The adsorbate system Cu(I I 0)-p(2 x 1)0 has been used to prepare a two-dimensional adsorbate layer and almost defect free quasi-one-dimensional stripes with a width of 3-15 CuO rows, respectively. The onset of an unoccupied surface state band (at 0.56 eV above Fermi-energy on the fully covered surface) has been analyzed with respect to the quasi-particle lifetime at the crossover from two to one dimension. A drastic increase of the onset-width with decreasing stripe width is observed. It can be explained by a decrease of quasi-particle lifetime using a Fabry-Perot-like model. We obtain a reduction of lifetime from 37 +/- 8 fs on the two-dimensional adsorbate layer to 5 I fs on a three CuO rows wide stripe. (c) 2006 Elsevier B.V. All rights reserved.
Scanning tunneling spectroscopy data on the lifetime and bottom energy of a surface state band in quasi-one-dimensional stripes are presented as a function of stripe width. The adsorbate system Cu(I I 0)-p(2 x 1)0 has been used to prepare a two-dimensional adsorbate layer and almost defect free quasi-one-dimensional stripes with a width of 3-15 CuO rows, respectively. The onset of an unoccupied surface state band (at 0.56 eV above Fermi-energy on the fully covered surface) has been analyzed with respect to the quasi-particle lifetime at the crossover from two to one dimension. A drastic increase of the onset-width with decreasing stripe width is observed. It can be explained by a decrease of quasi-particle lifetime using a Fabry-Perot-like model. We obtain a reduction of lifetime from 37 +/- 8 fs on the two-dimensional adsorbate layer to 5 I fs on a three CuO rows wide stripe. (c) 2006 Elsevier B.V. All rights reserved.
