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Resonant Raman scat...
Resonant Raman scattering and photoinduced metastability in oxygen-deficient YBa2Cu3Ox
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Osada, M. (author)
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Kakihana, M. (author)
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Bäckström, Joakim (author)
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Kall, M. (author)
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Borjesson, L. (author)
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- 2000
- 2000
- English.
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In: Physica C. ; 338, s. 157-160
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https://urn.kb.se/re...
Abstract
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- 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 degrees 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. (C) 2000 Elsevier Science B.V. All rights reserved.
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