Low-temperature properties of the spin-1 antiferromagnetic Heisenberg chain with bond-alternation
نویسندگان
چکیده
We investigate the low-temperature properties of the spin-1 antiferromagnetic Heisenberg chain with bond-alternation by the quantum Monte Carlo method (loop algorithm). The strength of bond-alternation at the gapless point is estimated as δc = 0.2595 ± 0.0005. We confirm numerically that the low-temperature properties at the gapless point are consistent with field theoretical predictions. The numerical results are compared with those of the spin-1/2 antiferromagnetic Heisenberg chain and recent experimental results for [{Ni(333-tet)(μ-N3)}n](ClO4)n (333-tet=tetraamine N,N ′-bis(3aminopropyl)-1,3-propanediamine). PACS numbers: 75.40.-s, 75.40.Cx, 75.40.Mg, 75.50.Ee Typeset using REVTEX 1
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