Spin-Liquid State for Two-Dimensional Heisenberg Antiferromagnets on a Triangular Lattice

Details Spin-Liquid State for Two-Dimensional Heisenberg Antiferromagnets on a Triangular Lattice Spin-Liquid State for Two-Dimensional Heisenberg Antiferromagnets on a Triangular Lattice

1998-08-07

arxiv.org/abs/cond-mat/9808072v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, Revtex, Three figures are not included, and can be obtained by request (spfeng@sun.ihep.ac.cn)

Scientific paper

10.1142/S0217984998000792

The spin liquid state of the antiferromagnetic Heisenberg model on a triangular lattice is studied within the self-consistent Green's function method. It is shown that the spin excitation spectra is gapless, and ground-state energy per site is $E_{g}/NJ=-0.966$, which is in very good agreement with the results obtained within the variational Monte Carlo method based on the resonating-valence-bond state. Some thermodynamic properties are also discussed.

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