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Название: Existence of Neel Order in Some Spin-1/2 Heisenberg Antiferromagnets
Авторы: Kennedy T., Lieb E.H., Shastry B.S.
Journal of Statistical Physics, Vol. 53, Nos. 5/6, 1988. p. 1019-1030.
The methods of Dyson, Lieb, and Simon are extended to prove the existence of Neel order in the ground state of the 3D spin-l/2 Heisenberg antiferromagnet on the cubic lattice. We also consider the spin-l/2 antiferromagnet on the cubic lattice with the coupling in one of the three lattice directions taken to be r times its value in the other two lattice directions...