1998/07/14 by Dirk K. Morr, David Pines, Morr, Dirk K. +1
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #High-pressure geophysics and materials #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/9807214
4 pages, RevTeX, 4 eps figures embedded in the text
arxiv created 1998/07/14 · arxiv updated 2009/11/30
We explain the effects of superconductivity on the incommensurate magnetic response χ''(q,ω) observed in inelastic neutron scattering measurements on La2-xSrxCuO4. We show that a spin-fermion model correctly describes the frequency and momentum dependent changes of χ'' in the superconducting phase. We find these changes are generic features of an incommensurate spin structure and the d-wave symmetry of the superconducting gap and are thus expected for all cuprates with an incommensurate magnetic response. Our analysis of INS experiments in La2-xSrxCuO4 up to optimal doping suggests a Fermi surface which is closed around (π,π).