Abstract
We study a one-dimensional Heisenberg chain with competing ferromagnetic nearest-neighbor and antiferromagnetic next-nearest-neighbor interactions in a magnetic field. Starting from the fully polarized high-field state, we calculate the dispersions of the lowest-lying -magnon excitations and the saturation field . We show that the lowest-lying excitations are always bound multimagnon states with a total momentum of except for a small parameter range. We argue that Bose condensation of the bound magnons leads to novel Tomonaga-Luttinger liquids with multipolar correlations; nematic- and triatic-ordered liquids correspond to and .
- Received 20 June 2007
- Publisher error corrected 27 August 2007
DOI:https://doi.org/10.1103/PhysRevB.76.060407
©2007 American Physical Society
Corrections
27 August 2007