Variational evidence for spin liquids in frustrated lattices
- Department of Physics, Ames Laboratory United States Department of Energy, Ames, Iowa 50011 (United States)
- Department of Physics, University of California, Berkeley, California 94720 (United States)
We present a Gutzwiller-projected variational state appropriate for Heisenberg quantum antiferromagnets which incorporates staggered magnetization as a continuous variational parameter. Although we obtain N{acute e}el-ordered ground states with appropriate sublattice magnetization on the square, honeycomb, and triangular lattice spin-1/2 quantum antiferromagnets, we find no such order on the {ital kagom{acute e}} lattice, providing evidence that the ground state on the {ital kagom{acute e}} lattice is disordered. The spin-spin correlations we obtain for spins separated by more than a lattice constant are similar to those obtained by exact diagonalization of small clusters. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Ames National Laboratory
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 284698
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 53, Issue 22; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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