Polaron transport in the paramagnetic phase of electron-doped manganites

被引：30

作者：

Cohn, JL ^{[1
]}

Chiorescu, C

Neumeier, JJ

机构：

[1] Univ Miami, Dept Phys, Coral Gables, FL 33124 USA

[2] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.72.024422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electrical resistivity, Hall coefficient, and thermopower as functions of temperature are reported for lightly electron-doped Ca1-xLaxMnO3 (0 <= x <= 0.10). Unlike the case of hole-doped ferromagnetic manganites, the magnitude and temperature dependence of the Hall mobility (mu(H)) for these compounds is found to be inconsistent with small-polaron theory. The transport data are better described by the Feynman polaron theory and imply intermediate coupling (alpha similar or equal to 5.4) with a band effective mass m(*)similar to 4.3m(0) and a polaron mass m(p)similar to 10m(0).

引用

页数：6

共 47 条

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