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Quantum J1-J2 antiferromagnet on a stacked square lattice: influence of the interlayer coupling on the ground-state
D Schmalfuss1, R Darradi, J Richter
1Institut für Theoretische Physik, Universität Magdeburg, 39016 Magdeburg, Germany.
Abstract:
Using the coupled-cluster method and the rotation-invariant Green's function method, we study the influence of the interlayer coupling Jperpendicular on the magnetic ordering in the ground state of the spin-1/2 J1-J2 frustrated Heisenberg antiferromagnet (J1-J2 model) on the stacked square lattice. In agreement with known results for the J1-J2 model on the strictly two-dimensional square lattice (Jperpendicular=0), we find that the phases with magnetic long-range order at small J2
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