TY  - JOUR
AU  - Götze, Kathrin
AU  - Pearce, Matthew
AU  - Negi, Suchit
AU  - Soh, Jian-Rui
AU  - Prabhakaran, Dharmalingam
AU  - Goddard, Paul
TI  - Fermi surface and effective masses of IrO<sub>2</sub> probed by de Haas-van Alphen quantum oscillations
JO  - Physical review materials
VL  - 9
IS  - 10
SN  - 2475-9953
CY  - College Park, MD
PB  - APS
M1  - PUBDB-2025-01597
SP  - 104201
PY  - 2025
AB  - 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.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1103/b1sg-8gps
UR  - https://bib-pubdb1.desy.de/record/627757
ER  -