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Time-resolved two-photon photoemission from Cu(100): Energy dependence of electron relaxation

C. A. Schmuttenmaer, M. Aeschlimann, H. E. Elsayed-Ali, R. J. D. Miller, D. A. Mantell, J. Cao, and Y. Gao
Phys. Rev. B 50, 8957(R) – Published 15 September 1994
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Abstract

A time-domain measurement of the relaxation time of photoexcited electrons as a function of excitation energy at a single-crystal Cu(100) surface has been made with time-resolved two-photon photoemission. The relaxation lifetime of the excited electrons is found to decrease rapidly with the amount of excitation energy above the Fermi level, and we compare the measured lifetimes with a calculation based on Fermi-liquid theory. The results reveal a qualitative agreement with the theory, and indicate that effects due to transport of the electrons away from the surface and into the bulk are important.

    DOI:https://doi.org/10.1103/PhysRevB.50.8957

    ©1994 American Physical Society

    Authors & Affiliations

    C. A. Schmuttenmaer, M. Aeschlimann, H. E. Elsayed-Ali, and R. J. D. Miller

    • Center for Photoinduced Charge Transfer, Department of Chemistry, University of Rochester, Rochester, New York 14627

    D. A. Mantell

    • Xerox Webster Research Center, Webster, New York 14580

    J. Cao and Y. Gao

    • Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627

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    Issue

    Vol. 50, Iss. 12 — 15 September 1994

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