Resonance peak in underdoped cuprates

Abstract

The magnetic susceptibility measured in neutron scattering experiments in underdoped YBa${}_2$Cu${}_3$O${}_{7-y}$ is interpreted based on the self-consistent solution of the t-J model of a Cu-O plane. The calculations reproduce correctly the frequency and momentum dependencies of the susceptibility and its variation with doping and temperature in the normal and superconducting states. This allows us to interpret the maximum in the frequency dependence -- the resonance peak -- as a manifestation of the excitation branch of localized Cu spins and to relate the frequency of the maximum to the size of the spin gap. The low-frequency shoulder well resolved in the susceptibility of superconducting crystals is connected with a pronounced maximum in the damping of the spin excitations. This maximum is caused by intense quasiparticle peaks in the hole spectral function for momenta near the Fermi surface and by the nesting.

9 pages, 6 figures

References in corpus (5)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• A relation between the resonance neutron peak and ARPES data in cuprates
• Resonant Spin Excitation in an Overdoped High Temperature Superconductor
• Two-dimensional t-J model at moderate doping
• The rotationally invariant approximation for the two-dimensional t-J model

Cited by in corpus (10)

• Dynamic spin susceptibility in the t-J model
• Dynamic spin susceptibility of superconducting cuprates: A microscopic theory of the magnetic resonance mode
• Spin fluctuations and high-temperature superconductivity in cuprates
• Dual Features of Magnetic Susceptibility in Superconducting Cuprates: a comparison to inelastic neutron scattering
• Low-frequency incommensurate magnetic response in strongly correlated systems
• Magnetic incommensurability in $p$-type cuprate perovskites
• Incommensurate magnetic response in cuprate perovskites
• The origin of hour-glass magnetic dispersion in underdoped cuprate superconductors
• Theory of the hourglass dispersion of magnetic excitations in high-T${}_c$ cuprates
• Unconventional state with two coexisting long-range orders for frustrated Heisenberg model at quantum phase transition