FERMION-FERMION SCATTERING IN THE HALL-MOBILITY OF LA-214 HTSC

被引：5

作者：

BESCHOTEN, B ^{[1
]}

QUITMANN, C ^{[1
]}

BOROWSKI, R ^{[1
]}

KNAUF, N ^{[1
]}

GUNTHERODT, G ^{[1
]}

机构：

[1] UNIV COLOGNE,INST HYS 2,W-5000 COLOGNE,GERMANY

来源：

PHYSICA B | 1994年 / 194卷

关键词：

D O I：

10.1016/0921-4526(94)91259-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The inverse Hall mobility mu-1=rho/R(H) in (La2-xSrx)CuO4 follows a simple temperature dependence mu-1 = a + b . T(m) in under- and overdoped samples (0.1 less-than-or-equal-to x less-than-or-equal-to 0.21). This relation holds even in samples for which the resistivity is not linear in temperature. At low doping (x less-than-or-equal-to .15) the exponent is m = (2.1 +/- .1). The simple quadratic temperature dependence of the mobility is evidence for fermion-fermion scattering. This is supported by the fact that the absolute mobility decreases with the hole content x. It shows that the direct coupling between the holes is the dominant interaction in the normal state of La-214. At higher doping (x greater-than-or-equal-to .18) the exponent decreases to m congruent-to 1.7 indicating a change in the scattering mechanism.

引用

页码：1519 / 1520

页数：2