CO-DOPED BI2SR2CACU2OX - ANDERSON LOCALIZATION AND SUPERCONDUCTIVITY

被引：5

作者：

ALMERAS, P ^{[1
]}

BERGER, H ^{[1
]}

MARGARITONDO, G ^{[1
]}

MA, J ^{[1
]}

QUITMANN, C ^{[1
]}

KELLEY, RJ ^{[1
]}

ONELLION, M ^{[1
]}

机构：

[1] UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706

来源：

SOLID STATE COMMUNICATIONS | 1994年 / 91卷 / 07期

基金：

美国国家科学基金会;

关键词：

HIGH-T(C) SUPERCONDUCTORS; ELECTRONICS STATES; PHOTOELECTRON SPECTROSCOPIES;

D O I：

10.1016/0038-1098(94)90369-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Cobalt-doping of Bi2Sr2CaCu2Ox beyond a critical level of 1.5-1.6 at % produces both a large decrease in the superconducting transition critical temperature and all of the classic symptoms of Anderson localization. These include: a negative slope of the ab-plane resistivity vs temperature, no dispersing states near the Fermi level and a decrease of the photoemission signal in the same region. The correlation between Anderson localization and high-temperature superconductivity at low doping levels supports a non-local interaction for the paring mechanism, such as antiferromagnetic spin fluctuations.

引用

页码：535 / 538

页数：4

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