Observation of a direct transition in the sp-band of Cu(111) and 
(√3x√3)R30°-CO/Cu(111) in one- and two-photon photoemission

Velic, Dusan; Knoesel, Ernst; Wolf, Martin

doi:10.1016/S0039-6028(98)00932-7

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Observation of a direct transition in the sp-band of Cu(111) and (√3x√3)R30°-CO/Cu(111) in one- and two-photon photoemission

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Velic, Dusan
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Knoesel, Ernst
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Wolf, Martin
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Velic, D., Knoesel, E., & Wolf, M. (1999). Observation of a direct transition in the sp-band of Cu(111) and (√3x√3)R30°-CO/Cu(111) in one- and two-photon photoemission. Surface Science, 424(1), 1-6. doi:10.1016/S0039-6028(98)00932-7.

Cite as: https://hdl.handle.net/21.11116/0000-0008-F501-2

Abstract

One- and two-photon photoemission (1PPE and 2PPE) spectroscopy has been employed to characterize electronic states of the Cu(111) and (3x3)R30°-CO/Cu(111) systems. A 2PPE process with an unusual wavelength dependence (ΔE_kin=1.4Δhν) is observed and assigned to a direct transition from the lower to the upper branch of the copper sp-band. Good agreement (within ±25 to ±35 meV) between the experimental transitions and a two-band model for the Cu(111) band structure is obtained.