Where is the Quantum Spin Nematic?
Abstract
We provide strong evidence of the spin-nematic state in a paradigmatic ferro-antiferromagnetic -- model using analytical and density-matrix renormalization group methods. In zero field, the attraction of spin-flip pairs leads to a first-order transition and no nematic state, while pair-repulsion at larger stabilizes the nematic phase in a narrow region near the pair-condensation field. A devil's staircase of multi-pair condensates is conjectured for weak pair-attraction. A suppression of the spin-flip gap by many-body effects leads to an order-of-magnitude contraction of the nematic phase compared to na\"ive expectations. The proposed phase diagram should be broadly valid.
Cite
@article{arxiv.2209.00010,
title = {Where is the Quantum Spin Nematic?},
author = {Shengtao Jiang and Judit Romhányi and Steven R. White and M. E. Zhitomirsky and A. L. Chernyshev},
journal= {arXiv preprint arXiv:2209.00010},
year = {2023}
}
Comments
7 pages, 5 figures; 11 pages of supplemental materials; almost the same as the published version