Resonant Raman scattering and photoinduced metastability in oxygen-deficient YBa2Cu3Ox

M. Osada, M. Kakihana, J. Bäckström, M. Käll, L. Börjesson

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We studied the photoinduced metastable states in oxygen-deficient YBa2Cu3Ox (Y123) (x = 6.35-6.87). The states are identified by the intensity dependences of CuO-chain resonance on photo irradiation and temperature. Below room temperature (RT) the CuO-chain resonance can be completely suppressed by irradiation with visible light polarized along the CuO chains, indicating photo-assisted oxygen ordering. Above RT, the resonance intensity returns and saturates at T > 100°C. This behavior exactly reflects the temperature dependence of chain oxygen ordering in the same crystals observed by hard X-ray diffraction. The stability of the photo-induced state is in agreement with reported persistent photo-induced superconductivity effects.

Original languageEnglish
Pages (from-to)157-160
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume338
Issue number1
DOIs
Publication statusPublished - 2000 Aug 1
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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