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cond-mat1995★ 50 cited
quantum Heisenberg antiferromagnet on the triangular lattice: a group symmetry analysis of order by disorder
P. Lecheminant, B. Bernu, C. Lhuillier +1
On the triangular lattice, for between and , the classical Heisenberg model with first and second neighbor interactions presents four-sublattice ordered ground-s…
cond-mat1994★ 406 cited
Exact spectra, spin susceptibilities and order parameter of the quantum Heisenberg antiferromagnet on the triangular lattice
B. Bernu, P. Lecheminant, C. Lhuillier +1
Exact spectra of periodic samples are computed up to . Evidence of an extensive set of low lying levels, lower than the softest magnons, is exhibited. These low lying quant…