UNIVERSAL TRANSPORT ANOMALY IN YBA2CU3O7-TYPE SYSTEMS WITH REDUCED CARRIER DENSITY

被引：25

作者：

TAMEGAI, T ^{[1
]}

IYE, Y ^{[1
]}

机构：

[1] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.44.10167

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A systematic study of the YBa2Cu3O7-type (1:2:3) compounds with various carrier densities has revealed a universal presence of an anomaly in the transport coefficients at around 120 K when the carrier number per copper is 0.10-0.15. A comparison with a similar anomaly reported in La2-xBaxCuO4 at a comparable carrier density (x = 0.125) suggests that it is an inherent property of the CuO2 plane. The transport anomaly consists of a decrease in the Hall coefficient and an upturn of the resistivity as the temperature is lowered below 120 K. It suggests the destruction of a part of the Fermi surface by gap formation. Possible origins of such Fermi-surface instabilities and other possibilities for the transport anomaly are discussed.

引用

页码：10167 / 10172

页数：6

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