%0 Journal Article
%A Götze, Kathrin
%A Pearce, Matthew
%A Negi, Suchit
%A Soh, Jian-Rui
%A Prabhakaran, Dharmalingam
%A Goddard, Paul
%T Fermi surface and effective masses of IrO<sub>2</sub> probed by de Haas-van Alphen quantum oscillations
%J Physical review materials
%V 9
%N 10
%@ 2475-9953
%C College Park, MD
%I APS
%M PUBDB-2025-01597
%P 104201
%D 2025
%X Iridium-containing conducting materials are widely investigated for their strong spin-orbit couplingand potential topological properties. Recently the commonly used electrode material iridiumdioxide was found to host a large spin-Hall conductivity and was shown to support Dirac nodal lines.Here we present quantum-oscillation experiments on high-quality IrO<sub>2</sub> single crystals using the de Haas-van Alphen effect measured using torque magnetometry with a piezo-resistive microcantileveras well as density functional theory-based band-structure calculations. The angle, temperature andfield dependencies of the oscillations and the band dispersion provide valuable information on theproperties of the charge carriers, including the Fermi-surface geometry and electronic correlations.Comparison of experimental results to calculations allows us to assigns the observed de Haas-vanAlphen frequencies to the calculated Fermi surface topology. We find that the effective masses of IrO<sub>2</sub> are enhanced compared to the rest electron mass me, ranging from 1.9 to 3.0 me, whereasthe scattering times indicate excellent sample quality. We discuss our results in context with recent ARPES and band-structure calculation results that found Dirac nodal lines in IrO<sub>2</sub> and comparethe effective masses and other electronic properties to those of similar materials like the nodal chainmetal ReO<sub>2</sub> in which Dirac electrons with very light effective masses have been observed.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1103/b1sg-8gps
%U https://bib-pubdb1.desy.de/record/627757