Phonon-assisted double exchange in perovskite manganites

被引：106

作者：

Zhou, JS ^{[1
]}

Goodenough, JB ^{[1
]}

机构：

[1] Univ Texas, Ctr Mat Sci & Engn, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.80.2665

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of the temperature dependence of the thermoelectric power and the resistivity of O-18/O-16 isotope-exchanged (La1-xNdx)(0.7)Ca0.3MnO3 samples have confirmed the existence of vibronic electronic states below T-c in the narrow range of bandwidths where static, cooperative Jahn-Teller (J-T) deformations are suppressed and dynamic J-T deformations introduce vibrational modes into the interatomic spin-spin interactions. A giant isotope effect on T-c is related to a mass-enhanced change in both the density and mobility of the mobile charge carriers at T-c.

引用

页码：2665 / 2668

页数：4

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