Electric-field-tuned metallic fraction and dynamic percolation in a charge-ordered manganite

被引：21

作者：

Pandey, NK ^{[1
]}

Lobo, RPSM

Budhani, RC

机构：

[1] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India

[2] Ecole Super Phys & Chim Ind Ville Paris, Lab Phys Solide, CNRS UPR 5, F-75231 Paris 5, France

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.67.054413

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A percolative insulator-metal transition triggered by strong electric field is observed in epitaxial thin films of (Pr0.65La0.35)(0.7)Ca0.3MnO3. The field-driven metallic state is achieved in a regime of temperatures where the material is weakly ferromagnetic. Our experiments suggest that the metallic fraction reaches percolation threshold p(c) at a field-dependent temperature T-pc. A strong frequency dependence of complex ac resistance in the vicinity of T-pc is consistent with the picture of percolative transport in a phase-separated medium.

引用

页数：4

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