Pi excitation of the t-J model

Details Pi excitation of the t-J model Pi excitation of the t-J model

1997-10-14

arxiv.org/abs/cond-mat/9710139v1

Phys. Rev. B 58, 5719 (1998)

Physics

Condensed Matter

Superconductivity

33 pages, LATEX, 14 eps figs

Scientific paper

10.1103/PhysRevB.58.5719

In this paper, we present analytical and numerical calculations of the pi resonance in the t-J model. We show in detail how the pi resonance in the particle-particle channel couples to and appears in the dynamical spin correlation function in a superconducting state. The contribution of the pi resonance to the spin excitation spectrum can be estimated from general model-independent sum rules, and it agrees with our detailed calculations. The results are in overall agreement with the exact diagonalization studies of the t-J model. Earlier calculations predicted the correct doping dependence of the neutron resonance peak in the YBCO superconductor, and in this paper detailed energy and momentum dependence of the spin correlation function is presented. The microscopic equations of motion obtained within current formalism agree with that of the SO(5) nonlinear sigma model, where the pi resonance is interpreted as a pseudo Goldstone mode of the spontaneous SO(5) symmetry breaking.

Affiliated with

Also associated with

No associations

Rating

Pi excitation of the t-J model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Pi excitation of the t-J model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pi excitation of the t-J model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-166233