Transport and pressure properties of Na0.5-δCoO2 single crystals with metallic ground state

被引：4

作者：

Garbarino, G. ^{[1
,2
]}

Morales, F. ^{[1
,2
]}

Regueiro, M. Nunez ^{[1
,2
]}

Armand, M. ^{[3
]}

Lejay, P. ^{[1
,2
]}

机构：

[1] CNRS, Inst NEEL, F-38042 Grenoble 9, France

[2] Univ Grenoble 1, F-38042 Grenoble 9, France

[3] Univ Picardie, LRCS, F-80039 Amiens 1, France

来源：

EPL | 2008年 / 81卷 / 04期

关键词：

D O I：

10.1209/0295-5075/81/47005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report transport properties as a function of temperature and pressure up to 16GPa in single crystals of NaxCoO2. Our x = 0.5-delta samples, obtained by a novel de-intercalation method, present the transitions characteristic of x = 0.5 samples, albeit with a metallic ground state at low temperatures. Besides the obvious consequences of the sub-stoichiometry of our samples, we present evidence suggesting that an insulator state can be induced by disorder that localizes the few carriers left after the transitions. Copyright (C) EPLA, 2008.

引用

页数：4

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