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Extremely large magnetoresistance in the type-II Weyl semimetal MoTe2

文献类型：期刊论文

作者Chen, F. C.1,2; Lv, H. Y.1; Luo, X.1; Lu, W. J.1; Pei, Q. L.1; Lin, G. T.1,2; Han, Y. Y.3; Zhu, X. B.1; Song, W. H.1; Sun, Y. P.1,3,4
刊名PHYSICAL REVIEW B
出版日期2016-12-27
卷号94期号:23页码:1-7
DOI10.1103/PhysRevB.94.235154
文献子类Article
英文摘要We performed the angle dependent magnetoresistance (MR), Hall effect measurements, the temperature dependent magneto-thermoelectric power (TEP) S(T) measurements, and the first-principles calculations to study the electronic properties of orthorhombic phase MoTe2 (T-d - MoTe2), which was proposed to be electronically two dimensional (2D). There are some interesting findings about T-d - MoTe2. (1) A scaling approach epsilon(theta) = (sin(2)theta + gamma(-2) cos(2)theta)(1/2) is applied, where theta is the magnetic field angle with respect to the c axis of the crystal and gamma is the mass anisotropy. Unexpectedly, the electronically three-dimensional (3D) character with gamma as low as 1.9 is observed in T-d - MoTe2. (2) The possible Lifshitz transition and the following electronic structure change can be verified around T similar to 150K and T similar to 60 K, which is supported by the evidence of the slope changing of the temperature dependence of TEP, the carrier density extracted from Hall resistivity, and the onset temperature of gamma obtained from the MR measurements. The extremely large MR effect in T-d - MoTe2 could originate from the combination of the electron-hole compensation and a particular orbital texture on the electron pocket, which is supported by the calculations of electronic structure. Our results may provide a general scaling relation for the anisotropic MR and help to recognize the origins of the MR effect in other systems, such as the Weyl semimetals and the Dirac ones.
WOS关键词COLOSSAL MAGNETORESISTANCE ; GIANT MAGNETORESISTANCE ; ELECTRONIC-STRUCTURE ; ULTRAHIGH MOBILITY ; SINGLE-CRYSTALS ; GRAPHITE ; WTE2 ; SUPERCONDUCTIVITY ; RESISTIVITY ; DEPENDENCE
WOS研究方向Physics
语种英语
WOS记录号WOS:000391010200004
资助机构National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; National Key Research and Development Program(2016YFA0300404 ; 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Chinese Academy of Sciences' Large-Scale Scientific Facility(U1432139) ; Chinese Academy of Sciences' Large-Scale Scientific Facility(U1432139) ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; 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源URL[http://ir.hfcas.ac.cn:8080/handle/334002/22070]  
专题合肥物质科学研究院_中科院固体物理研究所
合肥物质科学研究院_中科院强磁场科学中心
作者单位1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Peoples R China
3.Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China
4.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714		 Chen, F. C.,Lv, H. Y.,Luo, X.,et al. Extremely large magnetoresistance in the type-II Weyl semimetal MoTe2[J]. PHYSICAL REVIEW B,2016,94(23):1-7.
APA Chen, F. C..,Lv, H. Y..,Luo, X..,Lu, W. J..,Pei, Q. L..,...&Sun, Y. P..(2016).Extremely large magnetoresistance in the type-II Weyl semimetal MoTe2.PHYSICAL REVIEW B,94(23),1-7.
MLA Chen, F. C.,et al."Extremely large magnetoresistance in the type-II Weyl semimetal MoTe2".PHYSICAL REVIEW B 94.23(2016):1-7.

入库方式： OAI收割

来源：合肥物质科学研究院

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