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Enhancement of persistent photoconductivity by uv excitation in GdBa2Cu3O6.3

T. Endo, A. Hoffmann, J. Santamaria, and Ivan K. Schuller
Phys. Rev. B 54, R3750(R) – Published 1 August 1996
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Abstract

The spectral dependence of the persistent photoconductivity in GdBa2Cu3O6.3 was measured in the near-infrared to the ultraviolet energy range. The excitation efficiency is strongly enhanced for a photon energy of 4.1 eV. Photons with this energy create electron-hole pairs close to oxygen vacancies in the Cu-O chain layers. Therefore, the probability for the excited electron to be trapped at an oxygen vacancy is very high, which leads to the strong enhancement of the excitation efficiency of persistent photoconductivity.

  • Received 28 February 1996

DOI:https://doi.org/10.1103/PhysRevB.54.R3750

©1996 American Physical Society

Authors & Affiliations

T. Endo*, A. Hoffmann, J. Santamaria, and Ivan K. Schuller

  • Department of Physics 0319, University of California-San Diego, La Jolla, California 92093-0319

  • *Permanent address: Faculty of Engineering, Mie University, Tsu, Mie 514, Japan.
  • Permanent address: Universidad Complutense, Madrid, Spain.

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Vol. 54, Iss. 6 — 1 August 1996

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