RAMAN-STUDY OF R0.5PR0.5BA2CU3O7-DELTA (R=Y, RARE-EARTH)

被引：21

作者：

BOGACHEV, G

ABRASHEV, M

ILIEV, M

POULAKIS, N

LIAROKAPIS, E

MITROS, C

KOUFOUDAKIS, A

PSYHARIS, V

机构：

[1] NATL TECH UNIV ATHENS,DEPT PHYS,GR-15780 ATHENS,GREECE

[2] NATL CTR SCI RES DEMOKRITOS,INST MAT SCI,GR-15310 ATHENS,GREECE

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.49.12151

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The polarized Raman scattering of the R0.5Pr0.5Ba2Cu3O7-delta series (R = La, Pr, Nd, Sm, Eu, Gd, Dy, Y, Ho, Er, Tm, Yb, Lu; delta approximately 0) which undergoes a superconductor-to-nonsuperconductor transition between R = Gd and Dy was studied. It was found that the appearance of superconductivity correlates with observation of a two-mode behavior of the R-ion-size-sensitive B1g-like mode of 0(2),O(3) out-of-phase vibrations. It was also established that the Ba (xx,A(g)) phonon line is of asymmetrical (Fano) shape for all R. The origin of the Fano effect usually attributed to interference with an electronic continuum is discussed.

引用

页码：12151 / 12158

页数：8

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