Giant Linear Magneto-resistance in Nonmagnetic PtBi2

Abstract

We synthesized nonmagnetic PtBi${}_2$ single crystals and observed a giant linear magneto-resistance (MR) up to 684\% under a magnetic field ${\mu }_{0}H$ = 15 T at $T$ = 2 K. The linear MR decreases with increasing temperature, but it is still as large as 61\% under ${\mu }_{0}H$ of 15 T at room temperature. Such a giant linear MR is unlikely to be described by the quantum model as the quantum condition is not satisfied. Instead, we found that the slope of MR scales with the Hall mobility, and it can be well explained by a classical disorder model.

arXiv commentAccepted for publication in APL

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• Observation of Dirac surface states in the hexagonal PtBi2, a possible origin of the linear magnetoresistance
• Bulk and surface electronic structure of trigonal structured PtBi2 studied by angle-resolved photoemission spectroscopy
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