Anisotropic Magnetotransport and Exotic Longitudinal Linear Magnetoresistance in WTe2 Crystals

Abstract

WTe2 semimetal, as a typical layered transition-metal dichalcogenide, has recently attracted much attention due to the extremely large, non-saturating parabolic magnetoresistance in perpendicular field. Here, we report a systematic study of the angular dependence of the magnetoresistance in WTe2 single crystal. The violation of the Kohler rule and a significant anisotropic magnetotransport behavior in different magnetic field directions are observed. Surprisingly, when the applied field is parallel to the tungsten chains of WTe2, an exotic large longitudinal linear magnetoresistance as high as 1200% at 15 T and 2 K is identified. Violation of the Kohler rule in transverse magnetoresistance can be understood based on a dual effect of the excitons formation and thermal activation, while large longitudinal linear magnetoresistance reflects perfectly the scattering and nesting of quasi-1D nature of this balanced hole-electron system. Our work will stimulate studies of such double-carrier correlated material and corresponding quantum physics.

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• Separation of Electron and Hole Dynamics in the Semimetal LaSb
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• Effect of aging-induced disorder on the quantum transport properties of atomically thin WTe${}_2$
• Observation of Dirac surface states in the hexagonal PtBi2, a possible origin of the linear magnetoresistance
• Correlation of Crystal Quality and Extreme Magnetoresistance of WTe${}_2$
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• Temperature independent band structure of WTe2 as observed from ARPES