Siddharthan, Rahul (1999) Exact ground state and kink-like excitations of a two-dimensional Heisenberg antiferromagnet. In: Physical Review B, 60 (14). R9904-R9907.
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Abstract
A rare example of a two-dimensional Heisenberg model with an exact dimerized ground state is presented. This model, which can be regarded as a variation on the kagome' lattice, has several features of interest: it has a highly (but not macroscopically) degenerate ground state; it is closely related to spin chains studied by earlier authors; in particular, it exhibits domain-wall-like "kink" excitations normally associated only with one-dimensional systems. In some limits it decouples into noninteracting chains; unusually, this happens in the limit of strong, rather than weak, interchain coupling. [S0163-1829(99)50338-X].
| Item Type: | Journal Article |
|---|---|
| Additional Information: | Copyright of this article belongs to The American Physical Society. |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 19 Jul 2009 04:23 |
| Last Modified: | 19 Sep 2010 05:27 |
| URI: | http://eprints.iisc.ernet.in/id/eprint/19325 |
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