Surface resonance transition of roughened Cu(1 1 0)

• Published in: Surface science Vol. 601; no. 9; pp. 2012 - 2016
• Main Authors: Zeybek, O., Davarpanah, A.M., Martin, D.S., Barrett, S.D.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-05-2007; Amsterdam Elsevier Science; New York, NY
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Copper; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Physics; Reflection spectroscopy; Surface electronic phenomena; Copper; Reflection spectroscopy; Surface electronic phenomena; Reflection spectrum; Transition elements
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/j.susc.2007.02.029

The temperature dependence of the reflection anisotropy spectroscopy (RAS) of a Cu(1
1
0) surface has been studied over the temperature range 700–1000
K. Because of the roughening transition at 900
K, the bimodal feature at 4.2
eV for a clean surface shifted to 4.3
eV on annealing. A significant decrease in intensity of the same energy level was also observed with increasing annealing temperature. In the annealing temperature range 700–1000
K, anharmonic behavior is expected to be the predominant process of atomic disordering at the surface. Changes in the RAS of Cu(1
1
0) as a result of thermal processing can be understood in terms of the associated changes in surface states. The RAS signal for a surface resonance transition at 4.2
eV is associated with monoatomic [0
0
1] steps.