Shubnikov-de Haas oscillations and the magnetic-field-induced suppression of the charge ordered state in Na0.5CoO2 -: art. no. 236402

被引：28

作者：

Balicas, L ^{[1
]}

Abdel-Jawad, M

Hussey, NE

Chou, FC

Lee, PA

机构：

[1] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA

[2] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[3] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

[4] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 23期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.94.236402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed electrical transport measurements at low temperatures and high magnetic fields in Na0.5CoO2 single crystals. Shubnikov-de Haas oscillations corresponding to only 1% of the area of the orthorhombic Brillouin zone were clearly observed, indicating that most of the original Fermi surface vanishes at the charge-ordering (CO) transition. In-plane magnetic fields were found to suppress strongly the CO state. For fields rotated within the conducting planes, we observe angular magnetoresistance oscillations whose periodicity changes from twofold to sixfold at the transition.

引用

页数：4

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