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Large violation of the Wiedemann-Franz law in Heusler, ferromagnetic, Weyl semimetal Co2MnAl
Robinson, Robert A.1; Min, Lujin2; Lee, Seng Huat3; Li, Peigang4; Wang, Yu1,3; Li, Jinguo5; Mao, Zhiqiang1,3
Corresponding AuthorMao, Zhiqiang(zim1@psu.edu)
2021-11-11
Source PublicationJOURNAL OF PHYSICS D-APPLIED PHYSICS
ISSN0022-3727
Volume54Issue:45Pages:8
AbstractThe 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.
KeywordWiedemann-Franz law Heusler alloy topological Weyl semimetal thermoelectric Wiedemann-Franz law violation ferromagnet
Funding OrganizationUS National Science Foundation
DOI10.1088/1361-6463/ac1cb6
Indexed BySCI
Languageen
Funding ProjectUS National Science Foundation[DMR 1917579] ; US National Science Foundation[1832031]
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
WOS IDWOS:000687396300001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159257
Collection中国科学院金属研究所
Corresponding AuthorMao, Zhiqiang
Affiliation1.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
Recommended Citation
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.
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