标题： 可积链的基态结构和交替自旋的低温行为 显示英文标题

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

摘要： 在本文中，我们继续研究了一个各向异性可积自旋链，该链由自旋$s=1$和$s=\frac{1}{2}$组成，这是我们在论文\cite{meissner}中开始的研究。 分析了热力学贝特 ansatz，特别是当两个耦合$\bar{c}$和$\tilde{c}$的符号不同时的情况。 对于共形不变模型（$\bar{c}=\tilde{c}$），我们计算了低温下的比热和磁化率。 在各向同性极限下，我们的分析进一步进行，并在相变线附近（在$T=0$时）计算了磁化率。 显示英文摘要

摘要： 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 $T=0$).