A class of Heisenberg models with the orthogonal dimer ground states
Strongly Correlated Electrons
2009-10-31 v1
Abstract
Extensions of the Shastry-Sutherland model are possible in various ways. In particular, it is possible to construct a natural model in three dimensions which has the exact dimer ground state. Recently found spin gap system SrCu_2(BO_3)_2 has this structure. The exchange constants between the layers is expected to be smaller than the intra-layer couplings. However, the exactness of the dimer state for the three dimensional structure is important to understand why magnetic properties of SrCu_2(BO_3)_2 are described well by the two dimensional model.
Keywords
Cite
@article{arxiv.cond-mat/9904014,
title = {A class of Heisenberg models with the orthogonal dimer ground states},
author = {Kazuo Ueda and Shin Miyahara},
journal= {arXiv preprint arXiv:cond-mat/9904014},
year = {2009}
}
Comments
3 pages, 5 figures, to appear in Journal of Physics: Condensed Matter