Hopping conductivity in one-dimensional Ca3Co2O6 single crystal

被引：5

作者：

Broto, JM

Raquet, B

Rakoto, H

Baibich, MN

Lambert, S

Maignan, A

机构：

[1] Lab Natl Champs Magnet Pulses, UMR 5830, F-31432 Toulouse 4, France

[2] UFRGS, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

[3] ISMRA Univ Caen, CNRS, UMR 6508, Lab CRISMAT, F-14050 Caen, France

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2002年 / 16卷 / 20-22期

关键词：

D O I：

10.1142/S0217979202014206

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We studied the electronic conductivity of the quasi-one dimensional Ca3Co2O6 single crystal. The results evidence a VRH conductivity With temperature-induced crossover between ID (intra-chain) and 3D transport and the opening of a Coulomb gap in the d bands. At low temperatures, all applied magnetic field induces a large negative magneto-resistance (MR) independent from the 3D magnetic ordering. Both spin-dependent hopping and field-induced suppression of the Coulomb gap are discussed.

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页码：3289 / 3292

页数：4

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