ELECTRON-DOPED SUPERCONDUCTIVITY AT 40-K IN THE INFINITE-LAYER COMPOUND SR1-YNDYCUO2

被引：396

作者：

SMITH, MG ^{[1
]}

MANTHIRAM, A ^{[1
]}

ZHOU, J ^{[1
]}

GOODENOUGH, JB ^{[1
]}

MARKERT, JT ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT PHYS,AUSTIN,TX 78712

来源：

NATURE | 1991年 / 351卷 / 6327期

关键词：

D O I：

10.1038/351549a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

THE known copper oxide superconductors all have intergrowth structures consisting of superconducting layers of fixed oxygen content alternating with non-superconducting oxide layers. Siegrist et al. 1 reported the synthesis of the 'infinite-layer' parent compound of the copper oxide superconductor - a structure comprising CuO2 planes separated only by calcium and strontium atoms, with the composition Ca0.86Sr0.14CuO2. Although this compound has not been made to superconduct, here we show that the isostructural compound Sr(1-y)Nd(y)CuO2, in which the substitution of neodymium for strontium adds electrons to the CuO2 planes, is superconducting at 40 K. The difference in dopant type seems to distinguish this superconductor from the superconductivity found in a multiphase sample of nominal composition Sr(1-y)Ba(y)CuO2 by Takano et al. 2, in an independent study.

引用

页码：549 / 551

页数：3

共 10 条

[1] CHEMICAL AND STRUCTURAL RELATIONSHIPS IN HIGH-TC MATERIALS [J].