1996/09/16 by Thomas Strohm, M. Cardona, Manuel Cardona · 7 citations
Chemistry · Physics and Astronomy · #Advanced Condensed Matter Physics #Inorganic Fluorides and Related Compounds #Physics of Superconductivity and Magnetism #cond-mat
paper · pdf · doi:10.1103/physrevb.55.12725
14 pages, LaTeX (RevTeX), 5 PostScript figures, uses multicol.sty, submitted to PRB
arxiv created 1996/09/16 · openalex publication_date 1997/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Superconductivity-induced structures in the electronic Raman spectra of high-Tc superconductors are computed using the results of ab initio local-density approximation linear muffin-tin-orbital three-dimensional band-structure calculations via numerical integrations of the mass fluctuations, either in the whole three-dimensional Brillouin zone or limiting the integrations to the Fermi surface. The results of both calculations are rather similar, the Brillouin-zone integration yielding additional weak structures related to the extended van Hove singularities. Similar calculations have been performed for the normal state of these high-Tc cuprates. Polarization configurations have been investigated and the results have been compared to experimental spectra. The assumption of a simple d_x2\mathrm\ensuremath-y2-like gap function allows us to explain a number of experimental features but is hard to reconcile with the relative positions of the A1g and B1g peaks.