Exact two-spinon contribution to the longitudinal dynamical structure factor of the anisotropic XXZ model with comparison to DMRG simulations

ORAL

Abstract

Motivated by inelastic neutron scattering experiments on quasi-one dimensional XXZ systems such as Yb2Pt2Pb, an exact formula for the two-spinon contribution to the dynamical structure factor is developed based on the quantum group (QG) approach. The results provide a QG derivation of the Baxter formula for the T=0 ordered spin. They are consistent with sum rules, and in excellent agreement with Density Matrix Renormalization Group (DMRG) simulations.

*DOE Grant No. DE-SC0012704, and UNAM-DGAPA-PAPIIT-IN106219.

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Presenters

  • Andreas Weichselbaum

    • Brookhaven National Laboratory
    • Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory

Authors

  • Andreas Weichselbaum

    • Brookhaven National Laboratory
    • Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory

  • Igor Zaliznyak

    • Brookhaven National Laboratory
    • Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory

  • Isaac P. Castillo

    • UNAM, Mexico City

  • Jean-Sébastien Caux

    • University of Amsterdam, The Netherlands