Resonant Raman scattering and photoinduced metastability in oxygen-deficient YBa2Cu3Ox

被引：6

作者：

Osada, M

Kakihana, M

Bäckström, J

Käll, M

Börjesson, L

机构：

[1] RIKEN, Inst Phys & Chem Res, Div Surface Characterizat, Wako, Saitama 35101, Japan

[2] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

[3] Chalmers Univ Technol, Dept Appl Phys, S-41296 Gothenburg, Sweden

来源：

PHYSICA C | 2000年 / 338卷 / 1-2期

关键词：

YBa2Cu3Ox; resonant Raman scattering; photoinduced metastability;

D O I：

10.1016/S0921-4534(00)00219-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页码：157 / 160

页数：4

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