Ground State Structure and Low Temperature Behaviour of an Integrable Chain with Alternating Spins

Details Ground State Structure and Low Temperature Behaviour of an Integrable Chain with Alternating Spins Ground State Structure and Low Temperature Behaviour of an Integrable Chain with Alternating Spins

1996-05-07

arxiv.org/abs/hep-th/9605041v1

J.Phys.A29:6471-6487,1996

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, LaTeX, uses ioplppt.sty and PicTeX macros

Scientific paper

10.1088/0305-4470/29/20/006

In this paper we continue the investigation of an anisotropic integrable spin chain, consisting of spins $s=1$ and $s=\frac{1}{2}$, started in our paper \cite{meissner}. The thermodynamic Bethe ansatz is analysed especially for the case, when the signs of the two couplings $\bar{c}$ and $\tilde{c}$ differ. For the conformally invariant model ($\bar{c}=\tilde{c}$) we have calculated heat capacity and magnetic susceptibility at low temperature. In the isotropic limit our analysis is carried out further and susceptibilities are calculated near phase transition lines (at $T=0$).

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