CARRIER-DENSITY-RELATED SUPERCONDUCTIVITY IN BISMUTH CUPRATES

被引：14

作者：

RATEAU, M ^{[1
]}

SURYANARAYANAN, R ^{[1
]}

GOROCHOV, O ^{[1
]}

PANKOWSKA, H ^{[1
]}

机构：

[1] CNRS,LAB PHYS SOLID BELLEVUE,F-92195 MEUDON,FRANCE

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.41.857

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report Hall-constant (RH) measurements on the Bi-Sr-Ca-Cu-O system. Two systems, 2:2:1:2 and 2:2:2:3, have been studied with a variety of heat treatments and cationic substitutions (Pb, Gd, Nd, Sm). The carrier density (n=1/eRH) at 300 K as a function of Tc for these polycrystalline samples show two distinct maxima one corresponding to the low-Tc (2:2:1:2) phase and the other to the high-Tc (2:2:2:3) phase. The data point to compelling evidence of correlations between charge carriers and superconductivity confirming similar Hall data on Y- and La-based cuprates. A discussion of some relevant models is presented. © 1990 The American Physical Society.

引用

页码：857 / 860

页数：4

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