Abstract
The ground-state ordering and dynamics of the two-dimensional frustrated Heisenberg antiferromagnet are explored using neutron scattering in high magnetic fields. We find that the dynamic correlations show a highly dispersive continuum of excited states, characteristic of the resonating valence bond state, arising from pairs of spinons. Quantum renormalization factors for the excitation energies (1.65) and incommensuration (0.56) are large.
- Received 11 July 2000
DOI:https://doi.org/10.1103/PhysRevLett.86.1335
©2001 American Physical Society