Balanced electron-hole transport in spin-orbit semimetal SrIrO3 heterostructures

Abstract

Relating the band structure of correlated semimetals to their transport properties is a complex and often open issue. The partial occupation of numerous electron and hole bands can result in properties that are seemingly in contrast with one another, complicating the extraction of the transport coefficients of different bands. The 5d oxide SrIrO3 hosts parabolic bands of heavy holes and light electrons in gapped Dirac cones due to the interplay between electron-electron interactions and spin-orbit coupling. We present a multifold approach relying on different experimental techniques and theoretical calculations to disentangle its complex electronic properties. By combining magnetotransport and thermoelectric measurements in a field-effect geometry with first-principles calculations, we quantitatively determine the transport coefficients of different conduction channels. Despite their different dispersion relationships, electrons and holes are found to have strikingly similar transport coefficients, yielding a holelike response under field-effect and thermoelectric measurements and a linear, electronlike Hall effect up to 33 T.

arXiv comment5 pages, 4 figures

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Cited by in corpus (9)

• Strange semimetal dynamics in SrIrO${}_3$
• Perovskite oxide heterojunction for Rashba-Dresselhaus assisted antiferromagnetic spintronics
• Magnetic interlayer coupling between ferromagnetic SrRuO${}_3$ layers through a SrIrO${}_3$ spacer
• Growth facets of SrIrO3 Thin Films and Single Crystals
• Topological phase diagram of Pb1-xSnxSe1-yTey
• Giant non-volatile electric field control of proximity induced magnetism in the spin-orbit semimetal SrIrO3
• Inducing ferromagnetism by structural engineering in a strongly spin-orbit coupled oxide
• Spatially modulated, orbital selective ferromagnetism in La${}_5$Co${}_2$Ge${}_3$
• Evidence for strong electron correlations in a non-symmorphic Dirac semimetal