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Critical behavior of the S=3/2 antiferromagnetic Heisenberg chain

K. Hallberg·X. Q. G. Wang·P. Horsch·A. Moreo
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Abstract

Using the density-matrix renormalization-group technique we study the long-wavelength properties of the spin S=3/2 nearest-neighbor Heisenberg chain. We obtain an accurate value for the spin velocity v=3.8+- 0.02, in agreement with experiment. Our results show conclusively that the model belongs to the same universality class as the S=1/2 Heisenberg chain, with a conformal central charge c=1 and critical exponent eta=1

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K. Hallberg, X. Q. G. Wang, P. Horsch, A. Moreo. 1996-03-12. Critical behavior of the S=3/2 antiferromagnetic Heisenberg chain. https://doi.org/10.1103/physrevlett.76.4955

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