OXYGEN MOBILITY IN YBA2CU3O7-DELTA - A RAMAN-STUDY

被引：26

作者：

BURNS, G

DACOL, FH

FEILD, C

HOLTZBERG, F

机构：

[1] IBM Research Division, T. J. Watson Research Center, Yorktown Heights

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 75卷 / 11期

关键词：

D O I：

10.1016/0038-1098(90)90405-Z

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

From Raman measurements on superconducting and non-superconducting YBa2Cu3O7-δ single crystals, we show that close to room temperature there is an unaccounted for, intense, oxygen vibrational mode at 598 cm-1. This (zz) polarized mode appears to arise from some chain oxygen atoms occupying another site in the crystal. Using laser heating and a shutter, we find that the time it takes to occupy or empty this site is less than 0.1 sec. If a charge carrier in the Cu-O plane induces the occupation of this new site, then a large electron-phonon coupling constant could result. © 1990.

引用

页码：893 / 896

页数：4

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