Unveiling an in-plane Hall effect in rutile RuO${}_2$ films

Abstract

The in-plane-magnetic-field-induced Hall effect (IPHE) observed in Weyl semimetals and PT-symmetric antiferromagnets has attracted increasing attention, as it breaks the stereotype that the Hall effect is induced by an out-of-plane magnetic field or magnetization. To date, the IPHE has been discussed mainly for materials with low-symmetry crystal/magnetic point groups. Here, we show that even if symmetry forbids an inherent IPHE that arises from any mechanism, an apparent IPHE can be generated by selecting a low-symmetry crystalline plane for measurement. For rutile RuO${}_2$, although its high symmetry forbids an inherent IPHE, films grown along the low-symmetry (1 1 1) and (1 0 1) orientations are found to exhibit a distinct IPHE. The in-plane Hall coefficients are quantitatively reproduced by referring to the out-of-plane Hall coefficients measured for the high-symmetry (1 0 0) and (0 0 1) planes, indicating that the observed IPHE is caused by a superposition of inequivalent out-of-plane Hall effects. Similar behaviour is also observed for paramagnetic rutile systems, indicating the ubiquity of the apparent IPHE in electronic and spintronic devices with low-symmetry crystalline planes.

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References in corpus (13)

• Mott transition in VO2 revealed by infrared spectroscopy and nano-imaging
• Tilted spin current generated by the collinear antiferromagnet RuO2
• Observation of spin-splitter torque in collinear antiferromagnetic RuO${}_2$
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• In-plane anomalous Hall effect in PT-symmetric antiferromagnetic materials
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• Planar Hall effect in topological Weyl and nodal line semimetals
• Symmetry-based requirement for the measurement of electrical and thermal Hall conductivity under an in-plane magnetic field
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• Substrate-induced spin-torque-like signal in spin-torque ferromagnetic resonance measurement
• Direction dependent switching of carrier-type enabled by Fermi surface geometry
• Observation of the In-plane Anomalous Hall Effect induced by Octupole in Magnetization Space

Cited by in corpus (4)

• Anomalous Hall effect in Dirac semimetal probed by in-plane magnetic field
• Exploration of Altermagnetism in $\mathrm{Ru}{\mathrm{O}}_2$
• Coexistence of unconventional spin Hall effect and antisymmetric planar Hall effect in IrO${}_2$
• Magneto-cubic and magneto-linear dependence observed in an in-plane anomalous Hall magnet