Pressure-induced polaronic to itinerant electronic transition in La1-xSrxMnO3 crystals

被引：146

作者：

Zhou, JS

Goodenough, JB

Asamitsu, A

Tokura, Y

机构：

[1] JRCAT,TSUKUBA,IBARAKI 305,JAPAN

[2] UNIV TOKYO,DEPT APPL PHYS,TOKYO 113,JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.79.3234

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of the temperature dependence of the resistivity rho(T) and thermoelectric power alpha(T) under several hydrostatic pressures were made on single crystals of La1-xSrxMnO3 with x = 0.12 and 0.15 in which charge ordering takes place below T-co. We report a transition from the polaronic to an itinerant electronic state in the pressure range 5 < P < 6 kbar in the x = 0.15 sample. The polaronic state is modeled as a mobile three-manganese cluster within a matrix of dynamic Jahn-Teller deformations at Mn(III) ions.

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页码：3234 / 3237

页数：4

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