Low-temperature properties of the spin-1 antiferromagnetic Heisenberg chain with bond-alternation

Abstract

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 ${\delta }_c=0.2595\pm 0.0005$. 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)($\mu$-N${}_3$)\}${}_n$](ClO${}_4$)${}_n$ (333-tet=tetraamine $N,N^{\prime }$-bis(3-aminopropyl)-1,3-propanediamine).

18 pages, RevTex, 9 figures, Submitted to Phys.Rev.B

References in corpus (1)

• Dynamics of the spin-half Heisenberg chain at intermediate temperatures

Cited by in corpus (16)

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