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Spin stiffness of frustrated Heisenberg antiferromagnets: Finite size scaling

机译：受抑制的海森堡反铁磁体的旋转刚度：有限尺寸缩放

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We calculate the spin stiffness of the S = 1/2 frustrated Heisenberg antiferromagnet on finite square lattices by means of the Schwinger - boson approach. COmparison with recent exact numerical results reveals that the observed lack of scaling with lattice size for intermediate to large frustration cannot be taken as an indication of absence of Neel order. This lack of scaling is already apparent for small frustration and is a finite lattice effect. Our results also indicate that the expected behaviour is regained for larger lattices than those considered in numerical studies. (author). 18 refs, 2 figs. (Atomindex citation 26:078971)

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