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
刊名	Applied Physics Letters
	2011
卷号	98 期号:20
关键词	sr-co-o thermoelectric properties inplane anisotropy thin-films magnetoresistance orientation
ISSN号	0003-6951
中文摘要	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]
原文出处	://WOS:000290812100037
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/30698]
专题	金属研究所_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).