LOCALIZATION EFFECTS AND METAL-INSULATOR TRANSITION IN OXIDE SUPERCONDUCTORS.

被引：0

作者：

Moshchalkov, V.V. ^{[1
]}

机构：

[1] Moscow State Univ, Moscow, USSR, Moscow State Univ, Moscow, USSR

来源：

Physica C: Superconductivity and its Applications | 1988年 / 156卷 / 01期

关键词：

CERAMIC MATERIALS - OXIDES;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Transport properties of high-T//c superconductors are analyzed on both insulating and metallic sides of the metal-insulator transition. The systematic change of the linear coefficient for resistivity versus temperature curves is explained as a result of the conductivity via metallic states in a narrow band with a bandwidth of 100-500 K determined by Sr concentration in La//2// minus //ySr//yCuO//4. The bandwidth W derived from the resistivity versus temperature curves fits the relation ln W varies directly as y** minus **1**/**3 which may be expected for the nearest-neighbour overlapping of strongly localized wave functions on Sr sites or oxygen sites in 123 compounds.

引用

页码：473 / 476

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