1998/08/19 by Torsten Dahm, T. Dahm, Dirk Manske +2 · 4 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.58.12454
to be published in Phys. Rev. B Nov. 1st
arxiv created 1998/08/19 · openalex publication_date 1998/11/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
The role of collective modes in various experiments on the cuprates is investigated. We calculate the neutron scattering, photoemission [angle-resolved photoemission spectroscopy (ARPES)], and Raman-scattering intensities below Tc within the fluctuation-exchange approximation for the two-dimensional Hubbard model. It is shown that the large peak in the dynamical spin susceptibility arises from a weakly damped spin-density-wave collective mode. This gives rise to a dip between the sharp low-energy peak and the higher binding energy hump in the ARPES spectrum. Furthermore, we show that the collective mode of the amplitude fluctuation of the d-wave gap yields a broad peak above the pair-breaking threshold in the B1g Raman spectrum.