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Two-dimensional Shubnikov–de Haas oscillations in PtSe2: A fermiological charge carrier investigation

Julian Max Salchegger1,*, Rajdeep Adhikari1,2,†, Bogdan Faina1, and Alberta Bonanni1,‡

  • 1Institut für Halbleiter-und-Festkörperphysik, Johannes Kepler University, Altenbergerstr. 69, A-4040 Linz, Austria
  • 2Linz institute of Technology, Johannes Kepler University, Altenbergerstr. 69, A-4040 Linz, Austria

  • *Contact author: julian.salchegger@jku.at
  • †Contact author: rajdeep.adhikari@jku.at
  • ‡Contact author: alberta.bonanni@jku.at

Phys. Rev. B 112, 195425 – Published 14 November, 2025

DOI: https://doi.org/10.1103/7dzw-wlpx

Abstract

High magnetic field and low temperature transport measurements are carried out in order to gain insight into the properties of the charge carriers of PtSe2. In particular, the Shubnikov–de Haas oscillations arising at applied magnetic field strengths ≳4.5T are found to occur exclusively in plane. An analysis of the oscillations via the Lifshitz-Kosevich formalism allows determining the charge carrier's cyclotron mass, quantum transport time, Berry phase, Fermi surface cross section, and Dingle temperature. The oscillations emerge at a layer thickness of ≈18nm and decrease in frequency for thinner PtSe2 flakes. Further, weak antilocalization (WAL) is observed despite the presence of magnetic moments from Pt vacancies, which typically inhibit such effects. An explanation is provided on how WAL and the Kondo effect can be observed within the same material.

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