2012/12/05 by H. Y. Zhang, H Y Zhang, Y. Zhou +5 · 1 citation
Materials Science · Physics and Astronomy · #Antiferromagnetism #Commensurability (mathematics) #Cuprate #Electronic band structure #Fermi liquid theory #Fermi surface #Inelastic neutron scattering #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Quasiparticle #Rare-earth and actinide compounds #Scattering #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/25/15/155603
published in Journal of Physics Condensed Matter 25(15), 155603 (IOP Publishing) · 5 pages, 3 figures
arxiv created 2012/12/05 · openalex publication_date 2013/03/19 · arxiv updated 2015/06/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The antiferromagnetic correlation plays an important role in high-Tc superconductors. Considering this effect, the magnetic excitations in n-type cuprates near the optimal doping are studied within the spin-density-wave description. The magnetic excitations are commensurate in the low-energy regime and further develop into spin-wave-like dispersion at higher energy, consistent with the inelastic neutron scattering measurements. We clearly demonstrate that the commensurability originates from the band splitting and Fermi surface topology. The commensurability is a normal state property and has nothing to do with d-wave superconductivity. Our results strongly suggest the essential role of antiferromagnetic correlations in the cuprates.