Renormalization group analysis of the spin-gap phase in the one-dimensional t-J model
Strongly Correlated Electrons
2016-08-31 v2
Abstract
We study the spin-gap phase in the one-dimensional t-J model, assuming that it is caused by the backward scattering process. Based on the renormalization group analysis and symmetry, we can determine the transition point between the Tomonaga-Luttinger liquid and the spin-gap phases, by the level crossing of the singlet and the triplet excitations. In contrast to the previous works, the obtained spin-gap region is unexpectedly large. We also check that the universality class of the transition belongs to the SU(2) Wess-Zumino-Witten model.
Keywords
Cite
@article{arxiv.cond-mat/9708204,
title = {Renormalization group analysis of the spin-gap phase in the one-dimensional t-J model},
author = {Masaaki Nakamura and Kiyohide Nomura and Atsuhiro Kitazawa},
journal= {arXiv preprint arXiv:cond-mat/9708204},
year = {2016}
}
Comments
4 pages(RevTeX), 5 figures(EPS), TITCMT-97-10, to appear in Phys. Rev. Lett