Zvonarev, M. B. and Giamarchi, T. and Cheianov, Vadim (2009) Dynamical Properties of the One-Dimensional Spin-1/2 Bose-Hubbard Model near a Mott-Insulator to Ferromagnetic-Liquid Transition. Physical review letters, 103 (11). -. ISSN 0031-9007
Full text not available from this repository.Abstract
We investigate the dynamics of the one-dimensional strongly repulsive spin-1/2 Bose-Hubbard model for filling nu <= 1. While at nu = 1 the system is a Hubbard-Mott insulator exhibiting dynamical properties of the Heisenberg ferromagnet, at nu < 1 it is a ferromagnetic liquid with complex spin dynamics. We find that close to the insulator-liquid transition the system admits for a complete separation of spin and density degrees of freedom valid at all energy and momentum scales within the t-J approximation. This allows us to derive the propagator of transverse spin waves and the shape of the magnon peak in the dynamic spin structure factor.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Physical review letters |
| Subjects: | Q Science > QC Physics |
| Departments: | Faculty of Science and Technology > Physics |
| ID Code: | 55541 |
| Deposited By: | ep_importer_pure |
| Deposited On: | 02 Jul 2012 16:08 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 20:39 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/55541 |
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