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2002 J. Phys. A: Math. Gen. 35 2173-2182 doi: 10.1088/0305-4470/35/9/307
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Abstract.
Motivated by recent investigations of transport properties of strongly correlated 1D models and thermal conductivity measurements of quasi 1D magnetic systems, we present results for the integrable spin-½ XXZ chain. The thermal conductivity κ(ω) of this model has 
κ(ω) = 
δ(ω), i.e. it is infinite for zero frequency ω. The weight of the delta peak is calculated exactly by a lattice path integral formulation. Numerical results for wide ranges of temperature and anisotropy are presented. The low- and high-temperature limits are studied analytically.
PACS numbers: 74.25.Fy, 02.30.lk, 75.10.Jm, 05.50.+q
Print publication: Issue 9 (8 March 2002) |
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