We measured the spectral dependency of persistent photoconductivity (PPC) in GdBa2Cu3O6.3 from the near infrared to the ultraviolet energy range. For a photon energy of 4.1 eV there is a strong enhancement in the excitation efficiency. Photons with this energy create electron-hole pairs close to oxygen vacancies in the Cu-O chain layers. This increases the probability of the excited electron to get trapped at an oxygen vacancy, and thus leads to a strong enhancement of the excitation efficiency of the PPC.
|Original language||English (US)|
|Number of pages||2|
|Journal||Czechoslovak Journal of Physics|
|Issue number||SUPPL. 2|
|State||Published - 1996|
ASJC Scopus subject areas
- Physics and Astronomy(all)