We investigate the ground state properties of the S=1/2 Heisenberg antiferromagnet on the triangular lattice using mainly exact diagonalization (for lattices up to N=36 sites) and the recently developed Green Function Monte Carlo with stochastic reconfiguration (up to N=144). A systematic size scaling of the order parameter and of the spin gap gives strong evidences for the presence of long-range Neel order in the ground state of this highly frustrated model. (C) 2000 American Institute of Physics. [S0021-8979(00)49808-7].
Ground state properties of the S=1/2 Heisenberg antiferromagnet on the triangular lattice
Sorella, Sandro
2000-01-01
Abstract
We investigate the ground state properties of the S=1/2 Heisenberg antiferromagnet on the triangular lattice using mainly exact diagonalization (for lattices up to N=36 sites) and the recently developed Green Function Monte Carlo with stochastic reconfiguration (up to N=144). A systematic size scaling of the order parameter and of the spin gap gives strong evidences for the presence of long-range Neel order in the ground state of this highly frustrated model. (C) 2000 American Institute of Physics. [S0021-8979(00)49808-7].File in questo prodotto:
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