Absence of a large superconductivity-induced gap in magnetic fluctuations of Sr2RuO4

Abstract

Inelastic neutron scattering experiments on Sr2RuO4 determine the spectral weight of the nesting induced magnetic fluctuations across the superconducting transition. There is no observable change at the superconducting transition down to an energy of ~0.35 meV, which is well below the 2 delta values reported in several tunneling experiments. At this and higher energies magnetic fluctuations clearly persist in the superconducting state. Only at energies below ~0.3 meV evidence for partial suppression of spectral weight in the superconducting state can be observed. This strongly suggests that the one-dimensional bands with the associated nesting fluctuations do not form the active, highly gapped bands in the superconducting pairing in Sr2RuO4.

accepted in Phys. Rev. Lett. (2017)

References in corpus (9)

• Non-Abelian Anyons and Topological Quantum Computation
• Chiral Superconductors
• Chiral P-Wave Order in Sr_2RuO_4
• Observation of half-height magnetization steps in Sr2RuO4
• Hidden quasi one-dimensional superconductivity in Sr${}_2$RuO${}_4$
• First-Order Superconducting Transition of Sr2RuO4
• Sharp magnetization jump at the first-order superconducting transition in Sr2RuO4
• Nodeless spin triplet superconducting gap in Sr2RuO4
• Spin Density Wave Fluctuations and p-wave Pairing in Sr2RuO4

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