CORRELATION OF SUPERCONDUCTIVITY WITH THE INFRARED ANOMALY IN (LA1-XMX)2(CU1-YNY)O4 (M = CA, SR AND BA, N = NI AND ZN)

被引：18

作者：

OHBAYASHI, K ^{[1
]}

TUKAMOTO, H ^{[1
]}

YAMASITA, H ^{[1
]}

FUKUMOTO, A ^{[1
]}

UTSUNOMIYA, Y ^{[1
]}

OGITA, N ^{[1
]}

UDAGAWA, M ^{[1
]}

FUNAHASHI, S ^{[1
]}

机构：

[1] JAPAN ATOM ENERGY RES INST,DEPT PHYS,TOKAI,IBARAKI 31911,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1990年 / 59卷 / 04期

关键词：

(La1-xMx)2CuO4; high-Tc oxide superconductor; infrared absorption; lattice vibration;

D O I：

10.1143/JPSJ.59.1372

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

For La2CuO4 based high-Tc superconducting oxide systems, three infrared absorption peaks by phonons, which were labeled as P1, P2 and P3 from the higher energy side, were observed in the energy region between 250 and 800 cm-1. The intensity of the peak P1 changed sensitively depending on the concentration of substituted ions. We call the fact the infrared anomaly. Superconductivity appears for samples for which the intensity ratio I(P1)/I(P2) is nearly zero. This correlation between the infrared anomaly and supeconductivity has been confirmed to be common not only for (La1-xM)2CuO4 (M=Ca, Sr and Ba) but also for (La1-xSrx)2(Cu1-y,Ny)O4 (N=Ni and Zn). From mode assignments, the anomalous peak P1 is inferred to correspond to stretching motions of Cu-O bonds along the bond direction perpendicular to the c-axis. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

引用

页码：1372 / 1383

页数：12

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