Neutron scattering studies on spin fluctuations in Sr${}_2$RuO${}_4$

Abstract

The magnetic excitations in Sr${}_2$RuO${}_4$ are studied by polarized and unpolarized neutron scattering experiments as a function of temperature. At the scattering vector of the Fermi-surface nesting with a half-integer out-of-plane component, there is no evidence for the appearance of a resonance excitation in the superconducting phase. The body of existing data indicates weakening of the scattered intensity in the nesting spectrum to occur at very low energies. The nesting signal persists up to 290 K but is strongly reduced. In contrast, a quasi-ferromagnetic contribution maintains its strength and still exhibits a finite width in momentum space.

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• Magnetic response of Sr${}_2$RuO${}_4$: quasi-local spin fluctuations due to Hund's coupling
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• Theory of chiral $p$-wave superconductivity with near-nodes for Sr${}_2$RuO${}_4$
• Dispersion of the high-energy phonon modes in Nd${}_{1.85}$Ce${}_{0.15}$CuO${}_4$
• Inelastic neutron scattering study of the magnetic fluctuations in Sr${}_2$RuO${}_4$
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• Horizontal Line Nodes in Sr2RuO4 Proved by Spin Resonance
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• Unconventional superconducting pairing symmetry induced by phonons
• Absence of a large superconductivity-induced gap in magnetic fluctuations of Sr2RuO4
• High sensitivity heat capacity measurements on Sr2RuO4 under uniaxial pressure
• Two-dimensional incommensurate magnetic fluctuations in Sr${}_2$(Ru${}_{0.99}$Ti${}_{0.01}$)O${}_4$
• Impurity induced double transitions for accidentally degenerate unconventional pairing states

Cited by in corpus (9)

• Superconductivity in Correlated Multi-Orbital Systems with Spin-Orbit Coupling: Coexistence of Even- and Odd-Frequency Pairing and the Case of Strontium Ruthenate
• Leading superconducting instabilities in three-dimensional models for Sr2RuO4
• Constraints on the superconducting state of Sr${}_2$RuO${}_4$ from elastocaloric measurements
• Distinct spin and orbital dynamics in Sr${}_2$RuO${}_4$
• Multipole-fluctuation pairing mechanism of $d_{x^2-y^2}+ig$ superconductivity in Sr${}_2$RuO${}_4$
• Enhanced Seebeck coefficient through the magnetic fluctuations in Sr${}_2$Ru${}_{1-x}{M}_x$O${}_4$ ($M=$ Co, Mn)
• Orbital isotropy of magnetic fluctuations in correlated electron materials induced by Hund's exchange coupling
• Spin Fluctuations in Sr${}_{1.8}$La${}_{0.2}$RuO${}_4$
• Anisotropic scattering rates in strain-tuned Sr${}_2$RuO${}_4$