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Condensed Matter Seminars
| Condensed Matter
Thursday, January 23, 2003
Physics Building, Room 204
Note special time.
Note special room.
[Host: Paul Fendley]
"Valence bond liquids and solids in geometrically frustrated magnets"
Frustrated magnets are models of strongly interacting systems.
Frustration reveals itself through a vast degeneracy of the classical
ground state of a magnet and is responsible for a large number of soft
modes that destroy magnetic order. Possible alternative phases that
could emerge in place of the Neel state are the valence-bond solid,
which breaks some lattice symmetry, and the valence-bond liquid, which
has no broken symmetries yet differs from a paramagnet by the
existence of a hidden topological order. We have recently found
examples of valence-bond liquids and solids in a study of almost
classical frustrated antiferromagnets on the pyrochlore lattice and
its planar analogs.
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