Spin-correlations of the spin-1/2 Heisenberg antiferromagnet on a square lattice

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Ground state and low energy excitations of the Heisenberg Antiferromagnet (AF) are investigated by exact diagonalization and variational Monte Carlo. The spin-correlations of the trial wave function are in excellent agreement with exact diagonalization and also with recent neutron scattering results forLa2CuO4. We identify an excited triplet which becomes degenerate with the ground state, allowing for spontaneous symmetry breaking at T=0.
Original languageEnglish
Pages (from-to)1285-1286
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Publication statusPublished - 1988
Externally publishedYes

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