Antiferromagnetic excitations and van Hove singularities inYBa2Cu3O6+x

1995/10/18 by G. Blumberg, Branko P. Stojković, Branko P. Stojkovic +1 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Iron-based superconductors research #Physics of Superconductivity and Magnetism #cond-mat #supr-con

paper · pdf · doi:10.1103/physrevb.52.r15741

REVTeX, 4 pages + 3 PostScript (compressed) figures; to appear in Phys. Rev. B (Rap. Comm.)

arxiv created 1995/10/18 · openalex publication_date 1995/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We show that in quasi-two-dimensional d-wave superconductors van Hove singularities close to the Fermi surface lead to magnetic quasiparticle excitations. We calculate the temperature and doping dependence of dynamical magnetic susceptibility for YBa₂Cu₃O_6+x and show that the proposed excitations are in agreement with inelastic-neutron-scattering experiments. In addition, the values of the gap parameter and in-plane antiferromagnetic coupling are much smaller than usually believed.

Cited by

• Magnetic excitations and their anisotropy inYBa2Cu3O6+x: Slave-boson mean-field analysis of the bilayert-Jmodel
• Doping dependence of the resonance peak and incommensuration in high-Tcsuperconductors