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- W3086386293 abstract "The polar Kerr effect in superconducting ${mathrm{Sr}}_{2}{mathrm{RuO}}_{4}$ implies finite ac anomalous Hall conductivity. Since intrinsic anomalous Hall effect (AHE) is not expected for a chiral superconducting pairing developed on the single Ru ${d}_{xy}$ orbital, multiorbital chiral pairing actively involving the Ru ${d}_{xz}$ and ${d}_{yz}$ orbitals has been proposed as a potential mechanism. Here we propose that AHE could still arise even if the chiral superconductivity is predominantly driven by the ${d}_{xy}$ orbital. This is demonstrated through two separate models which take into account subdominant orbitals in the Cooper pairing, one involving the oxygen ${p}_{x}$ and ${p}_{y}$ orbitals in the $mathrm{Ru}{mathrm{O}}_{2}$ plane, and another the ${d}_{xz}$ and ${d}_{yz}$ orbitals. In both models, finite orbital mixing between the dominant ${d}_{xy}$ and the other orbitals may induce interorbital pairing between them, and the resultant states support intrinsic AHE, with Kerr rotation angles that could potentially reconcile with the experimental observation. Our proposal therefore sheds new light on the microscopic pairing in ${mathrm{Sr}}_{2}{mathrm{RuO}}_{4}$. We also show that intrinsic Hall effect is generally absent for nonchiral states such as $mathcal{S}+imathcal{D}, mathcal{D}+imathcal{P}$, and $mathcal{D}+imathcal{G}$, which provides a clear constraint on the symmetry of the superconducting order in this material." @default.
- W3086386293 created "2020-09-21" @default.
- W3086386293 creator A5018073672 @default.
- W3086386293 creator A5059992212 @default.
- W3086386293 creator A5067250026 @default.
- W3086386293 creator A5075558970 @default.
- W3086386293 date "2020-11-24" @default.
- W3086386293 modified "2023-10-11" @default.
- W3086386293 title "Hidden anomalous Hall effect in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Sr</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>RuO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math> with chiral superconductivity dominated by the Ru <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>d</mml:mi><mml:mrow><mml:mi>x</mml:mi><mml:mi>y</mml:mi></mml:mrow></mml:msub></mml:math> orbital" @default.
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- W3086386293 doi "https://doi.org/10.1103/physrevb.102.180509" @default.
- W3086386293 hasPublicationYear "2020" @default.
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