Resonating Valence Bond Wave Functions for Strongly Frustrated Spin Systems

Details Resonating Valence Bond Wave Functions for Strongly Frustrated Spin Systems Resonating Valence Bond Wave Functions for Strongly Frustrated Spin Systems

2001-07-10

arxiv.org/abs/cond-mat/0107204v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 Pages, 5 figures, accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.87.097201

The Resonating Valence Bond (RVB) theory for two-dimensional quantum antiferromagnets is shown to be the correct paradigm for large enough ``quantum frustration''. This scenario, proposed long time ago but never confirmed by microscopic calculations, is very strongly supported by a new type of variational wave function, which is extremely close to the exact ground state of the $J_1{-}J_2$ Heisenberg model for $0.4 \lesssim J_2/J_1\lesssim 0.5$. This wave function is proposed to represent the generic spin-half RVB ground state in spin liquids.

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