On the valence bond solid in the presence of DzyaloshinskiiMoriya interaction
Journal
Journal of Magnetism and Magnetic Materials
Journal Volume
323
Journal Issue
2
Pages
232-236
Date Issued
2011
Author(s)
Abstract
We examine the stability of the valence bond solid (VBS) phase against the DzyaloshinskiiMoriya (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 4×L 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 AKLTDM case. However, the VBS spin gap closes in the Sandvik model due to the DM interaction. © 2010 Published by Elsevier B.V.
Type
journal article