POSITIVE HALL-COEFFICIENT OBSERVED IN SINGLE-CRYSTAL ND2-XCEXCUO4-DELTA AT LOW-TEMPERATURES

被引：138

作者：

WANG, ZZ ^{[1
]}

CHIEN, TR ^{[1
]}

ONG, NP ^{[1
]}

TARASCON, JM ^{[1
]}

WANG, E ^{[1
]}

机构：

[1] BELL COMMUN RES INC,RED BANK,NJ 07701

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.43.3020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Hall coefficient R(H) has been measured in superconducting single crystals of Nd(2-x)Ce(x)CuO4-delta(x approximately 0.15). Although R(H) is sample dependent in sign above approximately 100 K, it increases steeply to positive values in all crystals studied below approximately 80 K. R(H) remains T (temperature) dependent at 2 K, in contrast to the resistivity rho-a which saturates to a constant below 30 K. Using a two-band model, we account for the observed profiles of R(H) vs T and rho-a vs T. The analysis reveals that the scattering processes for the electronlike and holelike bands have vastly different temperature scales. The hole-scattering rate remains T dependent to 2 K. The question whether the hole or the electron quasiparticles are responsible for the superconductivity in Nd(2-x)Ce(x)CuO4-delta is discussed.

引用

页码：3020 / 3025

页数：6

共 25 条

[1] NORMAL TUNNELING AND NORMAL TRANSPORT - DIAGNOSTICS FOR THE RESONATING-VALENCE-BOND STATE [J].