The 1D spin-1/2 AF-Heisenberg model in a staggered field
arXiv:cond-mat/9806039 · doi:10.1007/s100510050470
Abstract
We investigate the scaling properties of the excitation energies and transition amplitudes of the one-dimensional spin-$1\over 2$ antiferromagnetic Heisenberg model exposed to an external perturbation. Two types of perturbations are discussed in detail: a staggered field and a dimerized field.
10 pages, 6 figures, to be published in Euro. Phys. J. B, LaTeX-class svjour from Springer