Lattice Instability in the Spin-Ladder System under Magnetic Field
Strongly Correlated Electrons
2019-08-17 v4
Abstract
We study theoretically the lattice instability in the spin gap systems under magnetic field. With the magnetic field larger than a critical value h_{c1}, the spin gap is collapsed and the magnetization arises. We found that the lattice distortion occurs in the spin-ladder at an incommensurate wavevector corresponding to the magnetization, while it does not occur in the Haldane system. At low temperatures the magnetization curve shows a first order phase transition with this lattice distortion.
Keywords
Cite
@article{arxiv.cond-mat/9802085,
title = {Lattice Instability in the Spin-Ladder System under Magnetic Field},
author = {Naoto Nagaosa and Shuichi Murakami},
journal= {arXiv preprint arXiv:cond-mat/9802085},
year = {2019}
}
Comments
10 pages, REVTEX, 2 figures(ps file), minor changes