2003/07/31 by D. Reznik, P. Bourges, L. Pintschovius +5 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.93.207003
published as Phys. Rev. Lett., 93, 207003 (2004) · Version 3: Author change. Changes made throughout the text and minor changes in figures, Model parameters slightly changed after a small error in the calculation was discovered
arxiv created 2004/03/12 · openalex publication_date 2004/11/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Detailed neutron scattering measurements of YBa2Cu3O6.95 found that the resonance peak and incommensurate magnetic scattering induced by superconductivity represent the same physical phenomenon: two dispersive branches that converge near 41 meV and the in-plane wave vector qAF=(\ensuremathπ/a,\ensuremathπ/a) to form the resonance peak. One branch has a circular symmetry around qAF and quadratic downward dispersion from \ensuremath≈41 meV to the spin gap of 33\ifmmode±\else\textpm\fi1 meV. The other, of lower intensity, disperses from \ensuremath≈41 meV to at least 55 meV. Our results exclude a quartet of vertical incommensurate rods in q-\ensuremathω space expected from spin waves produced by dynamical charge stripes as an origin of the observed incommensurate scattering in optimally doped YBCO.