Applied Physics Letters
Multiband quantum oscillations and Kohler's rule in the extremely large magnetoresistance material pyrite PtBi₂
Applied Physics Letters · 128, 261902 (2026)
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Introduction
Quantum oscillations in thermopower and magnetic torque identify multiple Fermi-surface orbits in pyrite PtBi₂. In the same material, the large nonsaturating magnetoresistance follows a single-parameter scaling over a broad temperature range.
A closer reading
Multiple oscillation branches coexist with a simple resistance scaling. A collapse of magnetoresistance curves alone does not count conducting bands; the thermopower and torque measurements provide an independent test.