Spin dynamics in the stripe phase of high-Tc cuprates with the modulation of superconducting order
National Laboratory of Solid State of Microstructure and Department of Physics, Nanjing University, Nanjing, 210093, P.R. China
2 Department of Physics, Hangzhou Normal University, Hangzhou, 310036, P.R. China
Revised: 30 June 2011
Published online: 12 August 2011
Possible superconducting order modulation and its effect on the spin susceptibility in the coexisting phase of the stripe and superconducting orders are investigated. It is shown that the superconducting order modulation is mainly caused by the spin-domain-derived scattering, while the charge-domain-derived scattering tends to suppress it in a wide parameter region. The modulation leads to a two-peak structure in the spin excitation spectrum, which is qualitatively consistent with the recent experimental observations in La2-xSrxCuO4. This result suggests the importance of the superconducting order modulation for the understanding of the multiform spin excitations in these cuprate superconductors.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2011