Anisotropy in the Antiferromagnetic Spin Fluctuations of Sr2RuO4

Abstract

It has been proposed that Sr_2RuO_4 exhibits spin triplet superconductivity mediated by ferromagnetic fluctuations. So far neutron scattering experiments have failed to detect any clear evidence of ferromagnetic spin fluctuations but, instead, this type of experiments has been successful in confirming the existence of incommensurate spin fluctuations near q=(1/3 1/3 0). For this reason there have been many efforts to associate the contributions of such incommensurate fluctuations to the mechanism of its superconductivity. Our unpolarized inelastic neutron scattering measurements revealed that these incommensurate spin fluctuations possess c-axis anisotropy with an anisotropic factor χ''_{c}/χ''_{a,b} of \sim 2.8. This result is consistent with some theoretical ideas that the incommensurate spin fluctuations with a c-axis anisotropy can be a origin of p-wave superconductivity of this material.

arXiv comment5 pages, 3 figures; accepted for publication in PRB

References in corpus (12)

• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• Ferromagnetic spin fluctuation induced superconductivity in Sr_2RuO_4
• Evidence for incommensurate spin fluctuations in Sr_2RuO_4
• Competitions in layered ruthenates: ferro- vs. antiferromagnetism and triplet vs. singlet pairing
• A polarized neutron-scattering study of the Cooper-pair moment in Sr2RuO4
• Spin-triplet superconductivity due to antiferromagnetic spin-fluctuation in Sr_2RuO_4
• Inelastic neutron scattering study of magnetic excitations in Sr${}_2$RuO${}_4$
• Incommensurate magnetic ordering in Sr_2Ru_(1-x)Ti_xO_4
• Mechanism of spin-triplet superconductivity in Sr2RuO4
• A crib-shaped triplet pairing gap function for an orthogonal pair of quasi-one dimensional Fermi surfaces in Sr${}_2$RuO${}_4$
• Electronic theory for the normal state spin dynamics in Sr${}_2$RuO${}_4$: anisotropy due to spin-orbit coupling
• Anisotropy of the incommensurate fluctuations in Sr2RuO4: a study with polarized neutrons

Cited by in corpus (9)

• Inelastic neutron scattering study of the magnetic fluctuations in Sr${}_2$RuO${}_4$
• Magnetic excitations in the metallic single-layer Ruthenates Ca(2-x)Sr(x)RuO(4) studied by inelastic neutron scattering
• Antiferromagnetic Order in Disorder-Induced Insulating Phase of SrRu_{1-x}Mn_xO_3 (0.4<x<0.6)
• Horizontal Line Nodes in Sr2RuO4 Proved by Spin Resonance
• Spin gap and L modulated intensity at the low-energy incommensurate magnetic fluctuations in the superconducting state of Sr2RuO4
• Two-dimensional incommensurate magnetic fluctuations in Sr${}_2$(Ru${}_{0.99}$Ti${}_{0.01}$)O${}_4$
• Electronic structure correspondence of singlet-triplet scale separation in strained Sr2RuO4
• Impurity induced magnetic ordering in Sr${}_2$RuO${}_4$
• Muon Spin Relaxation and Neutron Diffraction Studies of Cluster-Glass States in Sr1-xLaxRuO3