Flux period, spin gap, and pairing in the one-dimensional t-J-J'-model
Strongly Correlated Electrons
2009-11-10 v2
Abstract
Using the factorization of the wavefunction in the t-J-J'-model at small exchange couplings, we demonstrate the connection between the existence of a spin gap and an hc/2e flux periodicity of the ground state energy. We conjecture that all spin-gapped SU(2)-invariant Luttinger liquids have hc/2e flux periodicity, and that this is connected to the fact that a gapped spin-1/2 chain always breaks translational symmetry by doubling the unit cell.
Cite
@article{arxiv.cond-mat/0312106,
title = {Flux period, spin gap, and pairing in the one-dimensional t-J-J'-model},
author = {Alexander Seidel and Dung-Hai Lee},
journal= {arXiv preprint arXiv:cond-mat/0312106},
year = {2009}
}
Comments
Published version, 4 pages, 2 figures, RevTex4