| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-1197 - C8-1198 | |
| DOI | https://doi.org/10.1051/jphyscol:19888543 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1197-C8-1198
DOI: 10.1051/jphyscol:19888543
Department of Physics, Boston University, Boston MA 02215, U.S.A.
J. Phys. Colloques 49 (1988) C8-1197-C8-1198
DOI: 10.1051/jphyscol:19888543
ORDERING DUE TO DISORDER IN A FRUSTRATED XY ANTIFERROMAGNET
C. L. Henley et S. PrakashDepartment of Physics, Boston University, Boston MA 02215, U.S.A.
Abstract
XY spins on a square lattice dominated by second-neighbor antiferromagnetic exchange have nontrivial degeneracies of their classical ground states. Spin-wave calculations, intuitive arguments, and simulations show that thermal fluctuations select collinear states, wherein spins align parallel or antiparallel to a single direction, but dilution selects "anticollinear" states wherein the two sublattices order at right angles.