Evidence for the observation of surface states at the Cu(110)/electrolyte interface
Department of Physics, University of Liverpool - Liverpool L69 7ZE, UK, EU
2 Institut für Physikalische und Theoretische Chemie der Univeritat Bonn - Wegelerstrasse 12, D-53115 Bonn, Germany, EU
Accepted: 12 November 2010
The reflection anisotropy (RA) spectral profiles of the interfaces between Cu(110) surfaces and H2O, H2SO4 and HCl show a sharp positive feature at 2.2 eV that is identified with a transition between surface states at the -point of the surface Brillouin zone. In HCl this peak is narrow, its position is independent of applied potential and its intensity grows with increasing potential. The RA spectra of these interfaces also show a broad negative feature at 4.2 eV similar to that associated with  steps on atomically rough Cu(110) surfaces in UHV.
PACS: 73.20.-r – Electron states at surfaces and interfaces / 73.20.At – Surface states, band structure, electron density of states / 78.20.-e – Optical properties of bulk materials and thin films
© EPLA, 2010