The relationship between anisotropic magnetoresistance and topology of Fermi surface in Td-MoTe2 crystal

Layered transition-metal dichalcogenides have been recently attracted a lot of attention because of their unique physical properties, such as extremely large and anisotropic magnetoresistance (MR) in WTe2. In this work, we observed the abnormally anisotropic MR on Td-MoTe2 crystal that is strongly d...

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Veröffentlicht in:Journal of applied physics 2017-07, Vol.122 (4)
Hauptverfasser: Lv, Yang-Yang, Li, Xiao, Pang, Bin, Cao, Lin, Lin, Dajun, Zhang, Bin-Bin, Yao, Shu-Hua, Chen, Y. B., Zhou, Jian, Dong, Song-Tao, Zhang, Shan-Tao, Lu, Ming-Hui, Chen, Yan-Feng
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Sprache:eng
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Zusammenfassung:Layered transition-metal dichalcogenides have been recently attracted a lot of attention because of their unique physical properties, such as extremely large and anisotropic magnetoresistance (MR) in WTe2. In this work, we observed the abnormally anisotropic MR on Td-MoTe2 crystal that is strongly dependent on the temperature, as well as the orientations of both magnetic field B and electric field E with respect to crystallographic axes of Td-MoTe2. When E//a-axis and B//c-axis, MR is parabolically dependent on B and is as high as 520% under 9 T and 2 K conditions; the MR is quasi-linearly dependent on B when E//a-axis and B//b-axis (E//b-axis and B//c-axis), and the corresponding MR is only 130% (220%); MR is initially parabolically dependent on B, then linearly on B, and finally shows a saturate trend under E//B//a-axis (or E//B//b-axis) conditions, and the MR is about 16% (30%). These anisotropic MR behaviors can be qualitatively explained by the features of the Fermi surface of Td-MoTe2. This work may demonstrate the rich anisotropic physical behavior in layered transition-metal dichalcognides.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4995951