On the ordering of Na+ ions in NaxCoO2

被引：0

作者：

Roger, M. ^{[1
]}

Morris, D. J. P. ^{[2
]}

Tennant, D. A. ^{[3
]}

Gutmann, M. J. ^{[4
]}

Goff, J. P. ^{[2
]}

Prabhakaran, D. ^{[5
]}

Shannon, N. ^{[6
]}

Lake, B. ^{[5
]}

Boothroyd, A. T. ^{[5
]}

Coldea, R. ^{[5
]}

Deen, P. ^{[7
]}

机构：

[1] CEA Saclay, DSM, DRECAM, Serv Phys Etat Condense, F-9191 Gif Sur Yvette, France

[2] Univ Liverpool, Dept Phys, Liverpool, Merseyside L69 7ZE, England

[3] Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[4] Rutherford Appleton Lab, ISIS Fac, Didcot OX11 0QX, Oxon, England

[5] Clarendon Lab, Parks Rd, Oxford OX1 3PU, England

[6] Univ Tokyo, Grad Scu Frontier Sci, Dept Adv Mat Sci, Chiba 2778851, Japan

[7] European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France

来源：

LOW TEMPERATURE PHYSICS, PTS A AND B | 2006年 / 850卷

关键词：

cobaltate; charge order; magnetism;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The influence of electrostatic interactions on the ordering of sodium ions in NaxCoO2 is studied theoretically through Monte-Carlo simulations. For large x small di- or tri-vacancy clusters are stable with respect to isolated Na vacancies. At commensurate fillings these small clusters order in triangular superstructures. These results agree with recent electron diffraction data at x = 1/2 and 3/4. We have performed neutron Laue diffraction experiments at higher x, which confirm the predictions of this simple model. The consequences on the properties of the electronic charges in the Co layers are discussed.

引用

页码：1213 / +

页数：2

共 7 条

[1] CoO2, the end member of the LixCoO2 solid solution [J].

Amatucci, GG ;

Tarascon, JM ;

Klein, LC .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (03) :1114-1123

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

Balicas, L ;

Abdel-Jawad, M ;

Hussey, NE ;

Chou, FC ;

Lee, PA .

PHYSICAL REVIEW LETTERS, 2005, 94 (23)

[3]

ROGER M, 2005, CONDMAT0507040

[4]

SHI YG, 2004, CONDMAT0401052

[5] Superconductivity in two-dimensional CoO2 layers [J].

Takada, K ;

Sakurai, H ;

Takayama-Muromachi, E ;

Izumi, F ;

Dilanian, RA ;

Sasaki, T .

NATURE, 2003, 422 (6927) :53-55

[6]

YOKOI M, 2005, CONDMAT0506220

[7] Sodium ion ordering in NaxCoO2:: Electron diffraction study -: art. no. 024101 [J].

Zandbergen, HW ;

Foo, M ;

Xu, Q ;

Kumar, V ;

Cava, RJ .

PHYSICAL REVIEW B, 2004, 70 (02) :024101-1

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