Dirac nodal lines protected against spin-orbit interaction in 
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Nelson, Jocienne N.; Ruf, Jacob; Lee, Y.; Zeledon, Cyrus; Kawasaki, Jason K.; Moser, Simon; Rotenberg, Eli; Bostwick, Aaron; Schlom, Darrell G.; Shen, Kyle; Moreschini, Luca

doi:10.1103/physrevmaterials.3.064205

Cited by 26 publications

(28 citation statements)

References 55 publications

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“…Figure a,b shows the Fermi surface and energy momentum mappings measured along high symmetry directions in the k z = 0 plane, which shows a relatively good quality for ARPES on oxides. [ 35–38 ] Dispersive energy bands are observed along all three high symmetry directions near Fermi energy. Intriguingly, band crossing occurs at the binding energy of 0.35 and 0.15 eV along MX and ΓM directions, respectively, which can be visualized obviously in the second derivative of the band (Figure S9, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Electric Field Control of the Magnetic Weyl Fermion in an Epitaxial SrRuO₃ (111) Thin Film

Lin

Liu

et al. 2021

Advanced Materials

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The magnetic Weyl fermion originates from the time reversal symmetry (TRS)‐breaking in magnetic crystalline structures, where the topology and magnetism entangle with each other. Therefore, the magnetic Weyl fermion is expected to be effectively tuned by the magnetic field and electrical field, which holds promise for future topologically protected electronics. However, the electrical field control of the magnetic Weyl fermion has rarely been reported, which is prevented by the limited number of identified magnetic Weyl solids. Here, the electric field control of the magnetic Weyl fermion is demonstrated in an epitaxial SrRuO3 (111) thin film. The magnetic Weyl fermion in the SrRuO3 films is indicated by the chiral anomaly induced magnetotransport, and is verified by the observed Weyl nodes in the electronic structures characterized by the angle‐resolved photoemission spectroscopy (ARPES) and first‐principles calculations. Through the ionic‐liquid gating experiment, the effective manipulation of the Weyl fermion by electric field is demonstrated, in terms of the sign‐change of the ordinary Hall effect, the nonmonotonic tuning of the anomalous Hall effect, and the observation of the linear magnetoresistance under proper gating voltages. The work may stimulate the searching and tuning of Weyl fermions in other magnetic materials, which are promising in energy‐efficient electronics.

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Section: Resultsmentioning

confidence: 99%

Electric Field Control of the Magnetic Weyl Fermion in an Epitaxial SrRuO₃ (111) Thin Film

Lin

Liu

et al. 2021

Advanced Materials

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“…Some of these DNLs are protected from gapping out due to large SOC by the non-symmorphic symmetry of the rutile structure 18,19 . For IrO 2 and RuO 2 this has been recently confirmed by angleresolved photoemission spectroscopy and band structure studies 16,17,19 . In the vicinity of V O 's, this set of symmetries promotes the formation of the orbital 1CK and 2CK effect.…”

mentioning

confidence: 56%

“…The π/2 angle between adjacent octahedra leads to a fourfold screw axis symmetry. This non-symmorphic symmetry not only protects DNLs in IrO 2 against SOC-induced splitting 17,19 . It has also been linked to the high electrical conductivity of IrO 2 (ref.…”

Section: Resultsmentioning

confidence: 93%

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Oxygen vacancy-driven orbital multichannel Kondo effect in Dirac nodal line metals IrO2 and RuO2

Yeh

Lien

et al. 2020

Nat Commun

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Strong electron correlations have long been recognized as driving the emergence of novel phases of matter. A well recognized example is high-temperature superconductivity which cannot be understood in terms of the standard weak-coupling theory. The exotic properties that accompany the formation of the two-channel Kondo (2CK) effect, including the emergence of an unconventional metallic state in the low-energy limit, also originate from strong electron interactions. Despite its paradigmatic role for the formation of non-standard metal behavior, the stringent conditions required for its emergence have made the observation of the nonmagnetic, orbital 2CK effect in real quantum materials difficult, if not impossible. We report the observation of orbital one- and two-channel Kondo physics in the symmetry-enforced Dirac nodal line (DNL) metals IrO2 and RuO2 nanowires and show that the symmetries that enforce the existence of DNLs also promote the formation of nonmagnetic Kondo correlations. Rutile oxide nanostructures thus form a versatile quantum matter platform to engineer and explore intrinsic, interacting topological states of matter.

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“…Further experimental and theoretical efforts are required to understand the occurrence of the high spin Hall angle in IrO 2 . Moreover, due to presence of Dirac nodal lines (DNLs) [ 35,36 ] in epitaxial IrO 2 thin films, one might be able to tune the

σ_{SH}

to high (or low) values which is suitable for a spin current generator (or detector). The possible tunability of the

σ_{SH}

in IrO 2 warrants further investigation for its applicability in devices and thin‐films.…”

Section: Discussionmentioning

confidence: 99%

Spin Pumping and Inverse Spin Hall Effect in Iridium Oxide

et al. 2021

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Large spin‐to‐charge conversion (spin Hall angle) and spin Hall conductivity are prerequisites for development of next generation power efficient spintronic devices. In this context, heavy metals (e.g., Pt, W, etc.), topological insulators, and antiferromagnets are usually considered because they exhibit high spin–orbit coupling (SOC). In addition to the above materials, 5d transition metal oxide, for example, iridium oxide (IrO2) is a potential candidate which exhibits high SOC strength. Here a study of spin pumping and inverse spin Hall effect (ISHE), via ferromagnetic resonance (FMR), in IrO2/CoFeB system is reported. By investigating the in‐plane angular dependence of the ISHE voltage, the individual contribution of spin pumping and other spin rectification effects in the magnetic layer is identified. The authors' analysis shows significant contribution of spin pumping effect to the ISHE signal. It is shown that polycrystalline IrO2 thin film exhibits high spin Hall conductivity and spin Hall angle which are comparable to the values of Pt.

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Dirac nodal lines protected against spin-orbit interaction in IrO2

Cited by 26 publications

References 55 publications

Electric Field Control of the Magnetic Weyl Fermion in an Epitaxial SrRuO₃ (111) Thin Film

Electric Field Control of the Magnetic Weyl Fermion in an Epitaxial SrRuO₃ (111) Thin Film

Oxygen vacancy-driven orbital multichannel Kondo effect in Dirac nodal line metals IrO2 and RuO2

Spin Pumping and Inverse Spin Hall Effect in Iridium Oxide

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Dirac nodal lines protected against spin-orbit interaction in IrO2

Cited by 26 publications

References 55 publications

Electric Field Control of the Magnetic Weyl Fermion in an Epitaxial SrRuO3 (111) Thin Film

Electric Field Control of the Magnetic Weyl Fermion in an Epitaxial SrRuO3 (111) Thin Film

Oxygen vacancy-driven orbital multichannel Kondo effect in Dirac nodal line metals IrO2 and RuO2

Spin Pumping and Inverse Spin Hall Effect in Iridium Oxide

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Product

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Electric Field Control of the Magnetic Weyl Fermion in an Epitaxial SrRuO₃ (111) Thin Film

Electric Field Control of the Magnetic Weyl Fermion in an Epitaxial SrRuO₃ (111) Thin Film