Abstract
We discuss numerical results for the 1 — D spin 1/2 antiferromagnetic Heisenberg model with next-to-nearest neighbour coupling in the presence of a uniform magnetic field. The model develops zero frequency excitations at field-dependent soft-mode momenta. We compute critical quantities from finite size dependence of static structure factors.
talk presented by H. Kröger
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Audet, J.F., Fledderjohann, A., Gerhardt, C., Karbach, M., Kröger, H., Mütter, K.H. (1997). Critical properties of 1-D spin 1/2 antiferromagnetic heisenberg model. In: Clark, J.W., Ristig, M.L. (eds) Theory of Spin Lattices and Lattice Gauge Models. Lecture Notes in Physics, vol 494. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0104302
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DOI: https://doi.org/10.1007/BFb0104302
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