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
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Abstract

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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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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