Momentum-resolved excited-electron lifetimes on stepped Cu(7 7 5)

The lifetime of n=1 image-state electrons on stepped on Cu(7 7 5) has been measured as a function of their translational momentum, k ∥. At the terrace normal this lifetime is equal to that for flat Cu(1 1 1), i.e. τ=18±2 fs . For motion parallel to the step orientation, the lifetime decreases symmet...

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Bibliographic Details
Published inChemical physics letters Vol. 351; no. 1; pp. 1 - 8
Main Authors Shen, X.J., Kwak, H., Radojevic, A.M., Smadici, S., Mocuta, D., Osgood, R.M.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 04.01.2002
Elsevier Science
Subjects
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Metals. Metallurgy
Physics
Surface and interface electron states
Surface states, band structure, electron density of states
Many body theory
Lifetime
Surface electron state
Momentum
Property structure relationship
Copper
Experimental study
Atomic structure
Surface structure
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Summary:The lifetime of n=1 image-state electrons on stepped on Cu(7 7 5) has been measured as a function of their translational momentum, k ∥. At the terrace normal this lifetime is equal to that for flat Cu(1 1 1), i.e. τ=18±2 fs . For motion parallel to the step orientation, the lifetime decreases symmetrically about k ∥=0 and the absolute values are in close agreement with that predicted by a recent many-body theory. Contrasting data for motion perpendicular to the step edges is also presented.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(01)01356-2