TEMPERATURE-DEPENDENCE OF CONDUCTIVITY IN (LA,SR)MNO3

被引：115

作者：

FURUKAWA, N

机构：

[1] Institute for Solid State Physics, University of Tokyo, Tokyo 106, Roppongi 7-22-1, Minato-ku

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1995年 / 64卷 / 09期

关键词：

TRANSITION-METAL OXIDE; MANGANESE OXIDE; DOUBLE-EXCHANGE FERROMAGNETISM; OPTICAL CONDUCTIVITY; MAGNETORESISTANCE; KONDO LATTICE MODEL; INFINITE DIMENSION;

D O I：

10.1143/JPSJ.64.3164

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using the Kondo lattice model with classical spins in infinite dimension, conductivity in the perovskite-type 3d transition-metal oxide (La, Sr)MnO3 is theoretically studied. Green's functions as well as spontaneous magnetization are obtained exactly on the Bethe lattice as a function of temperature. Conductivity is calculated from the Kubo formula. Below the Curie temperature, resistivity as a function of magnetization is in good agreement with the experimental data. Anomalous behavior in the temperature dependence of the optical conductivity observed in (La, Sr)MnO3 is also explained.

引用

页码：3164 / 3167

页数：4

共 11 条

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