Magnetoresistance scaling in the layered cobaltate Ca3Co4O9

被引：16

作者：

Limelette, P. ^{[1
]}

Soret, J. C. ^{[1
]}

Muguerra, H. ^{[2
]}

Grebille, D. ^{[2
]}

机构：

[1] Univ Tours, Lab LEMA, UMR CNRS CEA 6157, UFR Sci, F-37200 Tours, France

[2] Univ Caen, Lab CRISMAT, UMR CNRS ENSICAEN 6508, F-14050 Caen, France

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.77.245123

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the low-temperature magnetic-field dependences of both the resistivity and the magnetization in the misfit cobaltate Ca(3)Co(4)O(9) from 60 K down to 2 K. The measured negative magnetoresistance reveals a scaling behavior with the magnetization which demonstrates a spin dependent scattering mechanism. This scaling is also found to be consistent with a shadowed metalliclike conduction over the whole temperature range. By explaining the observed transport crossover, this result sheds a new light on the nature of the elementary excitations relevant to the transport.

引用

页数：5

共 31 条

[1] On the thermoelectricity of correlated electrons in the zero-temperature limit [J].

Behnia, K ;

Jaccard, D ;

Flouquet, J .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (28) :5187-5198

[2] Interplay between magnetic properties and thermoelectricity in misfit and Na cobaltates [J].

Bobroff, J. ;

Herbert, S. ;

Lang, G. ;

Mendels, P. ;

Pelloquin, D. ;

Maignan, A. .

PHYSICAL REVIEW B, 2007, 76 (10)

[3] COULOMB GAP AND LOW-TEMPERATURE CONDUCTIVITY OF DISORDERED SYSTEMS [J].

EFROS, AL ;

SHKLOVSKII, BI .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1975, 8 (04) :L49-L51

[4] Charge ordering, commensurability, and metallicity in the phase diagram of the layered NaxCoO2 -: art. no. 247001 [J].

Foo, ML ;

Wang, YY ;

Watauchi, S ;

Zandbergen, HW ;

He, T ;

Cava, RJ ;

Ong, NP .

PHYSICAL REVIEW LETTERS, 2004, 92 (24) :247001-1

[5] Dynamical mean-field theory of strongly correlated fermion systems and the limit of infinite dimensions [J].

Georges, A ;

Kotliar, G ;

Krauth, W ;

Rozenberg, MJ .

REVIEWS OF MODERN PHYSICS, 1996, 68 (01) :13-125

[6] Strong correlations produce the Curie-Weiss phase of NaxCoO2 [J].

Haerter, Jan O. ;

Peterson, Michael R. ;

Shastry, B. Sriram .

PHYSICAL REVIEW LETTERS, 2006, 97 (22)

[7] Metal-insulator transitions [J].

Imada, M ;

Fujimori, A ;

Tokura, Y .

REVIEWS OF MODERN PHYSICS, 1998, 70 (04) :1039-1263

[8] Thermopower in cobalt oxides [J].

Koshibae, W ;

Tsutsui, K ;

Maekawa, S .

PHYSICAL REVIEW B, 2000, 62 (11) :6869-6872

[9]

KOUMOTO K, 2002, OXIDE THERMOELECTRIC

[10] Scaling behavior in thermoelectric misfit cobalt oxides [J].

Limelette, P. ;

Hebert, S. ;

Hardy, V. ;

Fresard, R. ;

Simon, Ch. ;

Maignan, A. .

PHYSICAL REVIEW LETTERS, 2006, 97 (04)

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