RESONANT RAMAN-SCATTERING OF OXYGEN-DEFICIENT YBA2CU3O7-DELTA - EVIDENCE FOR THE COEXISTENCE OF ORTHO-I, ORTHO-II, AND TETRAGONAL MICROSTRUCTURES

被引：61

作者：

ILIEV, M ^{[1
]}

THOMSEN, C ^{[1
]}

HADJIEV, V ^{[1
]}

CARDONA, M ^{[1
]}

机构：

[1] UNIV SOFIA,FAC PHYS,BU-1126 SOFIA,BULGARIA

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.47.12341

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The polarized Raman spectra of a single crystal of YBa2Cu3O7-delta (delta approximately 0.6) at 15 K were studied using the 647.1, 568.2, 530.9, and 482.5-nm Kr+ laser lines. The results give clear evidence for a multiphase scattering volume with the main microstructure phases corresponding to YBa2Cu3O7 (OI), YBa2Cu3O6.5 (OII), and YBa2Cu3O6 (T). Significant differences in the frequencies of the OI-, T-, and OII-related modes, as well as variations of the mode intensities with HBARomega(L) and scattering geometry, result in apparent shifts of the Ba, Cu(2), and O(4) lines.

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页码：12341 / 12344

页数：4

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