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  • Title: Angle-dependent magnetoresistance and quantum oscillations in high-mobility semimetal LuPtBi.
    Author: Xu G, Hou Z, Wang Y, Zhang X, Zhang H, Liu E, Xi X, Xu F, Wu G, Zhang XX, Wang W.
    Journal: J Phys Condens Matter; 2017 May 17; 29(19):195501. PubMed ID: 28290375.
    Abstract:
    The recent discovery of ultrahigh mobility and large positive magnetoresistance in the topologically non-trivial half-Heusler semimetal LuPtBi provides a unique playground for studying exotic physics and significant perspective for device applications. As an fcc-structured electron-hole-compensated semimetal, LuPtBi theoretically exhibits six symmetrically arranged anisotropic electron Fermi pockets and two nearly-spherical hole pockets, offering the opportunity to explore the physics of Fermi surfaces with simple angle-related magnetotransport properties. In this work, through angle-dependent transverse magnetoresistance measurements, in combination with high-field SdH quantum oscillations, we aimed to map out a Fermi surface with six anisotropic pockets in the high-temperature and low-field regime, and furthermore, identify a possible magnetic field driven Fermi surface change at lower temperatures. Reasons account for the Fermi surface change in LuPtBi are discussed in terms of the field-induced electron evacuation due to Landau quantization.
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