| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1801933 | Journal of Magnetism and Magnetic Materials | 2011 | 5 Pages |
Abstract
We examine the stability of the valence bond solid (VBS) phase against the Dzyaloshinskii-Moriya (DM) interaction in the bipartite lattice. We consider the VBS states in the AKLT model as well as the one in the Sandvik model in the 4ÃL lattice. We found that the VBS is very stable against the DM interaction qin the AKLT model. There is no quantum phase transition in the AKLT+DM case. However, the VBS spin gap closes in the Sandvik model due to the DM interaction.
Related Topics
Physical Sciences and Engineering
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Condensed Matter Physics
Authors
Chen-Nan Liao, Chyh-Hong Chern,