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Possible spin-liquid state at large S for the frustrated square Heisenberg lattice

1988; American Physical Society; Volume: 38; Issue: 13 Linguagem: Inglês

10.1103/physrevb.38.9335

1095-3795

Premala Chandra, Benoît Douçot,

Quantum and electron transport phenomena

We present conventional spin-wave calculations for a frustrated antiferromagnetic Hamiltonian on a square lattice. We find that quantum fluctuations can destabilize the classical ordered ground state, even at large $S$, for large enough values of frustration. This instability is likely to generate a spin liquid, providing the first example of a resonating-valence-bond ground state in two dimensions.