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Ferromagnetism Stabilized by Lattice Distortion at the Surface of the <i>p</i> -Wave Superconductor Sr <sub>2</sub> RuO <sub>4</sub>
233
Citations
8
References
2000
Year
Superconducting MaterialMagnetic PropertiesEngineeringFm Ground StateFerromagnetism StabilizedMagnetic ResonanceP-wave SuperconductivityMagnetic MaterialsMagnetismSuperconductivityQuantum MaterialsSuperconducting DevicesMaterials ScienceHigh-tc SuperconductivityPhysicsSpin-triplet PairingIron-based SuperconductorsQuantum MagnetismSpintronicsNatural SciencesCondensed Matter PhysicsApplied PhysicsLattice Distortion
Ferromagnetic (FM) spin fluctuations are believed to mediate the spin-triplet pairing for the p-wave superconductivity in Sr(2)RuO(4). Our experiments show that, at the surface, a bulk soft-phonon mode freezes into a static lattice distortion associated with an in-plane rotation of the RuO(6) octahedron. First-principle calculations confirm this structure and predict a FM ground state at the surface. This coupling between structure and magnetism in the environment of broken symmetry at the surface allows a reconsideration of the coupling mechanism in the bulk.
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