Journal of Superconductivity

, Volume 7, Issue 2, pp 489–491 | Cite as

Anomalous photoemission threshold in high-T c oxide superconductor with Cs and K submonolayers

  • G. V. Benemanskaya
  • M. N. Lapushkin
  • V. S. Vikhnin
XV. Microwave and Infrared Spectroscopy; Penetration Depth; Photoemission; NMR


The photoemission threshold and photocurrent spectra were investigated for Bi2Sr2CaCu2O8 crystals with K or Cs submonolayer films. The different films of K or Cs were deposited on the Bi-O surface in the temperature range 80–250 K. We observed an appreciable (up to 0.3 eV) energy shift of the threshold and a strong modification of the photocurrent spectra for different temperatures and submonolayer coverages. The appropriate model of such a phenomena is based on a quasimetallic K or Cs clusters effect and additional 2D-polaronic effect.

Key words

Photoemission threshold photocurrent spectrum Bi2Sr2CaCu2O8 


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  1. 1.
    G. V. Benemanskaya, M. N. Lapushkin, and M. I. Urbakh,Sov. Phys. JETF 75, 899 (1992).Google Scholar
  2. 2.
    R. H. Fowler,Phys. Rev. 38, 45 (1931).Google Scholar
  3. 3.
    T. A. Aruga and Y. Murata,Prog. Surf. Sci. 31, 61 (1989).Google Scholar
  4. 4.
    S. V. Moshkin. M. Yu., Vlasov, M. A. Kuz'mina, V. F. Yyvenko, T. N. Kaminckaya, I. V. Golubev, O. V. Frank-Kamenezkaya, A. R. Nestler, and E. F. Efimova,Supercond. Phys. Chem. Tech. 4, 1017 (1991).Google Scholar
  5. 5.
    G.-A. Boutry and H. Dormont,Phillips Tech. Rev. 30, 225 (1970).Google Scholar

Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • G. V. Benemanskaya
    • 1
  • M. N. Lapushkin
    • 1
  • V. S. Vikhnin
    • 1
  1. 1.A. F. Ioffe Physicotechnical InstituteSt. PetersburgRussia

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