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We report the measurements of de Haas-van Alphen (dHvA) oscillations in thenoncentrosymmetric superconductor BiPd. Several pieces of a complex multi-sheetFermi surface are identified, including a small pocket (frequency 40 T) whichis three dimensional and anisotropic. From the temperature dependence of theamplitude of the oscillations, the cyclotron effective mass is ($0.18$ $\pm$0.1) $m_e$. Further analysis showed a non-trivial $\pi$-Berry phase isassociated with the 40 T pocket, which strongly supports the presence oftopological states in bulk BiPd and may result in topological superconductivitydue to the proximity coupling to other bands.

Quantum oscillations and a non-trivial Berry phase in the noncentrosymmetric superconductor BiPd