Diffusive transport in spin-1 chains at high temperatures.
We present a numerical study on the spin and thermal conductivities of the spin-1 Heisenberg chain in the high temperature limit, in particular, the Drude weight contribution and frequency dependence. We use the exact diagonalization and the recently developed microcanonical Lanczos method; it allows us a finite size scaling analysis by the study of significantly larger lattices. This work, pointing to a diffusive rather than ballistic behavior, is discussed with respect to other recent theoretical and experimental studies.
Karadamoglou
J
J
Institut Romand de Recherche Numérique en Physique des Matériaux (IRRMA), EPFL, 1015 Lausanne, Switzerland.
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