POLARIZED RAMAN MEASUREMENTS OF Y1-XPRXBA2CU3O7

被引：42

作者：

YANG, IS

BURNS, G

DACOL, FH

TSUEI, CC

机构：

[1] IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, NY 10598

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.42.4240

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report polarized Raman measurements on small single crystals embedded in Y1-xPrxBa2Cu3O7 polycrystalline pellets. The measurements show two-mode behavior in the Cu-O bending mode of the CuO2 planes (B1g mode). The increase in frequency with x of the Ba-Ba stretching mode and the chain copper apical oxygen Cu(1)-O(4) stretching mode is consistent with hole localization on Ba sites due to Ba 5dO 2p covalency. This localization may be related to the suppression of superconductivity in this compound, which increases with increasing x. © 1990 The American Physical Society.

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页码：4240 / 4243

页数：4

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