From Neel long-range order to spin-liquids in the multiple-spin exchange model

Abstract

The phase diagram of the multiple-spin exchange model on the triangular lattice is studied using exact diagonalizations. The two-spin (J_2) and four-spin (J_4) exchanges have been taken into account for 12, 16, 19, 21, 24, and 27 site samples in the parameter region J_4=0 - 0.25 (for a fixed J_2=1). It is found that the three-sublattice Néel ordered state built up by the pure two-spin exchange can be destroyed by the four-spin exchange, forming a spin-liquid state. The different data suggest that the phase diagram in this range of parameters exhibits two phases. The pure J_2 phase is a three-sublattice Neel ordered phase, a small J_4 drives it into a spin-liquid state with a spin gap filled of a large number of singlets. This spin-liquid phase is not of the same generic kind as the phase studied by Misguich et al. [Phys. Rev. B 60, 1064 (1999)]. It is observed on the finite-size samples that the spin liquid phase, as the Neel ordered phase, exhibits a magnetization plateau at m = 1/3, and for J_4 >0.15 a second plateau atm=1/2. These two plateaus are associated respectively to the semi-classical orderings uud and uuud.

6 pages (RevTex), 5 figures (eps). Published version

References in corpus (9)

• Long range Neel order in the triangular Heisenberg model
• First excitations of the spin 1/2 Heisenberg antiferromagnet on the kagomé lattice
• Order versus Disorder in the Quantum Heisenberg Antiferromagnet on the Kagom{é} lattice: an approach through exact spectra analysis
• Green Function Monte Carlo with Stochastic Reconfiguration
• Spin-Liquid phase of the Multiple-Spin Exchange Hamiltonian on the Triangular Lattice
• Spin Liquid in the Multiple-Spin Exchange model on the Triangular lattice: 3He on graphite
• Green Function Monte Carlo with Stochastic Reconfiguration: an effective remedy for the sign problem disease
• Ground State of a Spin System with Two- and Four-spin Exchange Interactions on the Triangular Lattice
• Magnetization plateau in a two-dimensional multiple-spin exchange model

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