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

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

1996-03-12

arxiv.org/abs/cond-mat/9603082v1

Phys. Rev. Lett 76, 4955 (1996)

Physics

Condensed Matter

RevTeX (version 3.0), 4 twocolumn pages with 4 embedded figures

Scientific paper

10.1103/PhysRevLett.76.4955

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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