Magnetic Excitation Spectra from Spin-Vortices and Spin-Vortex-Induced Loop Currents in Hole-Doped Cuprates

Abstract

We argue that spin-vortices and loop currents induced by them ( spin-vortex-induced loop currents ) are crucial ingredients for superconductivity in hole-doped cuprates. The existence of the former is indicated by the hourglass-shaped magnetic excitation spectrum obtained by the inelastic neutron scattering experiments. The existence of the latter is indicated by the Kerr effect measurement and the recently observed hidden magnetic excitation spectrum. The existence of both spin-vortices and spin-vortex-induced currents points to the occurrence of the spin-vortex superconductivity in the cuprates. The suppression of superconductivity in the x =1/8 stripe-ordered sample is also explained by this theory.