Nernst Effect: Evidence of Local Kondo Scattering in Heavy Fermions

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	Nernst Effect: Evidence of Local Kondo Scattering in Heavy Fermions
	Sun, PJ ; Steglich, F
刊名	PHYSICAL REVIEW LETTERS
	2013
卷号	110 期号:21
ISSN号	0031-9007
通讯作者	Sun, PJ (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	A distinctly temperature-dependent Nernst coefficient, nu, which is strongly enhanced over that of LaCu2Si2, is observed between T = 2 and 300 K for CeCu2Si2 and Ce0.8La0.2Cu2Si2. The enhanced nu(T) is determined by the asymmetry of the on-site Kondo (conduction electron -4f electron) scattering rate. Taking into account the measured Hall mobility, mu(H), the highly unusual thermopower, S, of these systems can be semiquantitatively described by S(T) = -nu(T)/mu(H)(T), which explicitly demonstrates that the thermopower originates from the local Kondo scattering process over a wide temperature range from far above to well below the coherence temperature (approximate to 20 K for CeCu2Si2). Our results suggest that the Nernst effect can act as a proper probe of local charge-carrier scattering. This promises to impact on exploring the unconventional enhancement of the thermopower in correlated materials suited for potential applications.
资助信息	MOST of China [2012CB921701]; DFG [FG960]
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57243]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Sun, PJ,Steglich, F. Nernst Effect: Evidence of Local Kondo Scattering in Heavy Fermions[J]. PHYSICAL REVIEW LETTERS,2013,110(21).
APA	Sun, PJ,&Steglich, F.(2013).Nernst Effect: Evidence of Local Kondo Scattering in Heavy Fermions.PHYSICAL REVIEW LETTERS,110(21).
MLA	Sun, PJ,et al."Nernst Effect: Evidence of Local Kondo Scattering in Heavy Fermions".PHYSICAL REVIEW LETTERS 110.21(2013).