Optimizing the RVB state on a triangular lattice: Presence of the long-range order
Condensed Matter
2015-06-25 v1
Abstract
We present a Schwinger-boson approach for the RVB state of the spin-1/2 Heisenberg antiferromagnet on a triangular lattice. It is shown that Gutzwiller projection of the mean-field state that includes both antiferromagnetic and ferromagnetic decouplings leads to optimizing the RVB pair amplitudes within a self-consistent approximation. The resulting state yields, by Monte Carlo simulations, energies and spin-spin correlations in excellent agreement with the exact diagonalization result on finite lattices (up to 36 sites). We conclude that the optimized RVB wavefunction possesses a long-range three-sublattice order.
Keywords
Cite
@article{arxiv.cond-mat/9312059,
title = {Optimizing the RVB state on a triangular lattice: Presence of the long-range order},
author = {Yong-Cong Chen},
journal= {arXiv preprint arXiv:cond-mat/9312059},
year = {2015}
}
Comments
11 pages, plain LATEX (no local report #)