Quantum phase transition in spin-32 systems on the hexagonal lattice – optimum ground state approach ∗

@inproceedings{Niggemann1997QuantumPT,
  title={Quantum phase transition in spin-32 systems on the hexagonal lattice – optimum ground state approach ∗},
  author={Hiltrud Niggemann and Andreas Kl{\"u}mper and J. Zittartz},
  year={1997}
}
Optimum ground states are constructed in two dimensions by using so called ver-tex state models. These models are graphical generalizations of the well-known matrix product ground states for spin chains. On the hexagonal lattice we obtain a one-parametric set of ground states for a five-dimensional manifold of S = 3 2 Hamilto-nians. Correlation functions within these ground states are calculated using Monte-Carlo simulations. In contrast to the one-dimensional situation, these states exhibit a… CONTINUE READING

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