Large violation of the Wiedemann-Franz law in Heusler, ferromagnetic, Weyl semimetal Co2MnAl

doi:10.1088/1361-6463/ac1cb6

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	Large violation of the Wiedemann-Franz law in Heusler, ferromagnetic, Weyl semimetal Co2MnAl
	Robinson, Robert A.1; Min, Lujin 2; Lee, Seng Huat 3; Li, Peigang 4; Wang, Yu 1,3; Li, Jinguo 5; Mao, Zhiqiang 1,3
刊名	JOURNAL OF PHYSICS D-APPLIED PHYSICS
	2021-11-11
卷号	54 期号:45 页码:8
关键词	Wiedemann-Franz law Heusler alloy topological Weyl semimetal thermoelectric Wiedemann-Franz law violation ferromagnet
ISSN号	0022-3727
DOI	10.1088/1361-6463/ac1cb6
通讯作者	Mao, Zhiqiang(zim1@psu.edu)
英文摘要	The Wiedemann-Franz (WF) law relates the electronic component of the thermal conductivity to the electrical conductivity in metals through the Lorenz number. The WF law has proven to be remarkably robust, however violations have been observed in many topological materials. In this work, we report thermoelectric measurements conducted on Heusler, ferromagnetic, Weyl semimetal Co2MnAl which shows a drastic, temperature dependent violation of the WF law below 300 K. We then discuss our result in the context of known physical explanations for WF law violation. Both the magnitude and temperature dependence of the violation in Co2MnAl are extreme, indicating that there may be more than one effect contributing to the violation in this system.
资助项目	US National Science Foundation[DMR 1917579] ; US National Science Foundation[1832031]
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000687396300001
资助机构	US National Science Foundation
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/159256]
专题	金属研究所_中国科学院金属研究所
通讯作者	Mao, Zhiqiang
作者单位	1.Penn State Univ, Dept Phys, University Pk, PA 16802 USA 2.Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA 3.Penn State Univ, Mat Res Inst, 2D Crystal Consortium, University Pk, PA 16802 USA 4.Tulane Univ, Dept Phys & Engn Phys, New Orleans, LA 70118 USA 5.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Robinson, Robert A.,Min, Lujin,Lee, Seng Huat,et al. Large violation of the Wiedemann-Franz law in Heusler, ferromagnetic, Weyl semimetal Co2MnAl[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2021,54(45):8.
APA	Robinson, Robert A..,Min, Lujin.,Lee, Seng Huat.,Li, Peigang.,Wang, Yu.,...&Mao, Zhiqiang.(2021).Large violation of the Wiedemann-Franz law in Heusler, ferromagnetic, Weyl semimetal Co2MnAl.JOURNAL OF PHYSICS D-APPLIED PHYSICS,54(45),8.
MLA	Robinson, Robert A.,et al."Large violation of the Wiedemann-Franz law in Heusler, ferromagnetic, Weyl semimetal Co2MnAl".JOURNAL OF PHYSICS D-APPLIED PHYSICS 54.45(2021):8.