Magnetoresistance of YBa2Cu3O7 in the cold spots model

被引：23

作者：

Zheleznyak, AT ^{[1
]}

Yakovenko, VM

Drew, HD

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[2] Univ Maryland, Ctr Superconduct Res, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.59.207

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the in-plane magnetoresistance Delta rho(xx)/rho(xx) of YBa2Cu3O7 in a magnetic field applied perpendicular to the CuO2 planes for the "cold spots" model. In this model, the electron relaxation time tau(2) proportional to 1/T-2 at small regions on the Fermi surface near the Brillouin zone diagonals is much longer than the relaxation time tau(1) proportional to 1/T at the rest of the Fermi surface (T is temperature). In qualitative agreement with the experiment, we find that Kohler's rule is strongly violated, but the ratio Delta rho(xx)/rho(xx) tan(2)theta(H), where tan theta(H) is the Hall angle, is approximately temperature independent. We find the ratio is about 5.5, which is of the same order of magnitude as in the experiment. [S0163-1829(99)11801-0].

引用

页码：207 / 210

页数：4

共 17 条

[1]

Abrikosov A., 1988, FUNDAMENTALS THEORY

[2] PLANE DIMPLING AND SADDLE-POINT BIFURCATION IN THE BAND STRUCTURES OF OPTIMALLY DOPED HIGH-TEMPERATURE SUPERCONDUCTORS - A TIGHT-BINDING MODEL [J].