Half-ordered state in the anisotropic Haldane-gap antiferromagnet NDMAP
Strongly Correlated Electrons
2009-11-10 v1
Abstract
Neutron diffraction experiments performed on the Haldane gap material NDMAP in high magnetic fields applied at an angle to the principal anisotropy axes reveal two consecutive field-induced phase transitions. The low-field phase is the gapped Haldane state, while at high fields the system exhibits 3-dimensional long-range Neel order. In a peculiar phase found at intermediate fields only half of all the spin chains participate in the long-range ordering, while the other half remains disordered and gapped.
Cite
@article{arxiv.cond-mat/0411293,
title = {Half-ordered state in the anisotropic Haldane-gap antiferromagnet NDMAP},
author = {A. Zheludev and B. Grenier and E. Ressouche and L. -P. Regnault and Z. Honda K. Katsumata},
journal= {arXiv preprint arXiv:cond-mat/0411293},
year = {2009}
}
Comments
4 pages, 2 figures, submitted to Phys. Rev. B