Ultraslow polaron dynamics in low-doped manganites from 139La NMR-NQR and muon spin rotation -: art. no. 127206

被引：43

作者：

Allodi, G

Guidi, MC

De Renzi, R

Caneiro, A

Pinsard, L

机构：

[1] Univ Parma, Dipartimento Fis, I-43100 Parma, Italy

[2] Univ Parma, Ist Nazl Fis Mat, I-43100 Parma, Italy

[3] Ctr Atom Bariloche, San Carlos De Bariloche, Rio Negro, Argentina

[4] Univ Paris 11, UMR 8648, Lab Physicochim Solides, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.87.127206

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a La-139 NMR investigation of low-doped insulating manganite samples (LaMnO3+delta and La1-yCayMnO3+delta) as a function of temperature. A volume fraction with fast nuclear relaxations was revealed by the inhomogeneous loss of the NMR signal over a broad temperature interval. Comparison with muon spin rotation data demonstrates that the wipeout of the La-139 signal is mainly due to slowly fluctuating electric field gradients. This provides strong evidence for the slow diffusion,of lattice excitations, identified with Jahn-Teller small polarons.

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页码：1 / 127206

页数：4

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