de Haas-van Alphen study on three-dimensional topological semimetal pyrite PtBi2

TL;DR

This study investigates the quantum oscillations in the topological Dirac semimetal pyrite PtBi2, revealing high mobility, light effective mass, and detailed Fermi surface topology through de Haas-van Alphen measurements.

Contribution

It provides the first systematic de Haas-van Alphen analysis of pyrite PtBi2, uncovering detailed electronic properties and Fermi surface features of this topological semimetal.

Findings

High quantum mobility and light effective mass of Dirac fermions

Mapping of Fermi surface topology using angular dependence of oscillations

Identification of additional oscillation frequencies beyond SdH measurements

Abstract

We present the systematic de Haas-van Alphen (dHvA) quantum oscillations studies on the recently discovered topological Dirac semimetal pyrite PtBi2 single crystals. Remarkable dHvA oscillations were observed at field as low as 1.5 T. From the analyses of dHvA oscillations, we have extracted high quantum mobility, light effective mass and phase shift factor for Dirac fermions in pyrite PtBi2. From the angular dependence of dHvA oscillations, we have mapped out the topology of the Fermi surface and identified additional oscillation frequencies which were not probed by SdH oscillations.