Anisotropic thermopower and magnetothermopower in a misfit-layered calcium cobaltite

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	Anisotropic thermopower and magnetothermopower in a misfit-layered calcium cobaltite
	G. D. Tang; H. H. Guo; T. Yang; D. W. Zhang; X. N. Xu; L. Y. Wang; Z. H. Wang; H. H. Wen; Z. D. Zhang; Y. W. Du
	2011
发表期刊	Applied Physics Letters
ISSN	0003-6951
卷号	98 期号:20
摘要	An unusual anisotropy of thermopower and magnetothermopower has been observed in the powerful thermoelectric Ca(3)Co(4)O(9+delta) single crystal. The in-plane thermopower is about twice as big as the out-of-plane thermopower. Combining ab initio band structure calculation with semiclassical model analysis, we understand this anisotropy with band structure effects and especially with anisotropic Fermi surface. We find that a strong anisotropy in the topology of Fermi surface leads to the anisotropy of (magneto)thermopower. This study may also shed light on anisotropic properties of other layered cobalt oxides. (C) 2011 American Institute of Physics. [doi:10.1063/1.3592831]
部门归属	[tang, g. d.; zhang, d. w.; xu, x. n.; wang, l. y.; wang, z. h.; wen, h. h.; du, y. w.] nanjing univ, natl lab solid state microstruct, nanjing 210093, peoples r china. [tang, g. d.; zhang, d. w.; xu, x. n.; wang, l. y.; wang, z. h.; wen, h. h.; du, y. w.] nanjing univ, dept phys, nanjing 210093, peoples r china. [tang, g. d.; zhang, d. w.; xu, x. n.; wang, l. y.; wang, z. h.; wen, h. h.; du, y. w.] jiangsu prov lab nanotechnol, nanjing 210093, peoples r china. [guo, h. h.; yang, t.; zhang, z. d.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [guo, h. h.; yang, t.; zhang, z. d.] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;tang, gd (reprint author), nanjing univ, natl lab solid state microstruct, nanjing 210093, peoples r china;yangteng@imr.ac.cn zhwang@nju.edu.cn
关键词	Sr-co-o Thermoelectric Properties Inplane Anisotropy Thin-films Magnetoresistance Orientation
URL	查看原文
WOS记录号	WOS:000290812100037
引用统计	被引频次：32[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30698
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. D. Tang,H. H. Guo,T. Yang,et al. Anisotropic thermopower and magnetothermopower in a misfit-layered calcium cobaltite[J]. Applied Physics Letters,2011,98(20).
APA	G. D. Tang.,H. H. Guo.,T. Yang.,D. W. Zhang.,X. N. Xu.,...&Y. W. Du.(2011).Anisotropic thermopower and magnetothermopower in a misfit-layered calcium cobaltite.Applied Physics Letters,98(20).
MLA	G. D. Tang,et al."Anisotropic thermopower and magnetothermopower in a misfit-layered calcium cobaltite".Applied Physics Letters 98.20(2011).

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