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    Magnetotransport Studies of topological Sb_2Te_(2-x)Se_x Single Crystal

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    Magnetotransport Studies, Miertschin/Shrestha, WTAMU 2021 (886.3Kb)
    Date
    2021-03-04
    Author
    Miertschin, Duncan
    Shrestha, Keshav
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    Abstract
    We have studied the magnetotransport properties of a topological compound, Sb2Te2-xSex. The electrical resistance decreases with temperature showing the metallic behavior. Magnetoresistance (MR) increases with increasing magnetic field, and it reaches a value as high as 300 % at 14 T without showing any sign of saturation. At higher fields, MR shows clear Shubnikov de Haas (SdH) oscillations with a single frequency near 178 T. In addition, there appears a tiny peak near 24 T in the frequency spectrum. We have also analyzed the temperature-dependent quantum oscillations using the Lifshitz-Kosevich theory and calculated several physical parameters characterizing the SdH oscillations. The possible origin of the low frequency at 24 T will also be discussed.
    Description
    Expected Findings: Magnetoresistance of the Sb_2Te_(2-x)Se_x single crystal shows clear quantum oscillations with two distinct frequencies.
    URI
    https://hdl.handle.net/11310/417
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