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
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
收藏
页码:893 / 896
页数:4
相关论文
共 19 条
[11]   POSSIBLE ORIGINS OF HIGH-TC SUPERCONDUCTIVITY [J].
HARDY, JR ;
FLOCKEN, JW .
PHYSICAL REVIEW LETTERS, 1988, 60 (21) :2191-2193
[12]  
HOLTZBERG F, 1990, J CRYST GROWTH, V27, P107
[13]   STRUCTURAL-PROPERTIES OF OXYGEN-DEFICIENT YBA2CU3O7-DELTA [J].
JORGENSEN, JD ;
VEAL, BW ;
PAULIKAS, AP ;
NOWICKI, LJ ;
CRABTREE, GW ;
CLAUS, H ;
KWOK, WK .
PHYSICAL REVIEW B, 1990, 41 (04) :1863-1877
[14]   STRUCTURE OF THE INTERSTITIAL OXYGEN DEFECT IN LA2NIO4+DELTA [J].
JORGENSEN, JD ;
DABROWSKI, B ;
PEI, S ;
RICHARDS, DR ;
HINKS, DG .
PHYSICAL REVIEW B, 1989, 40 (04) :2187-2199
[15]  
JORGENSEN JD, IN PRESS PHYSICA C
[16]   HIGH-TEMPERATURE RAMAN MEASUREMENTS OF SINGLE-CRYSTAL YBA2CU3O7-X [J].
MCCARTY, KF ;
HAMILTON, JC ;
SHELTON, RN ;
GINLEY, DS .
PHYSICAL REVIEW B, 1988, 38 (04) :2914-2917
[17]  
MORGENSTERN I, COMMUNICATION
[18]  
PHILLIPS JC, 1989, PHYSICS HIGH TC SUPE
[19]  
VEAL BW, IN PRESS PHYS REV B