Ergodicity of the extended anisotropic 1D Heisenberg model: response at low temperatures

Plekhanov, Evgeny; Avella, Adolfo; Mancini, Ferdinando

Ergodicity of the extended anisotropic 1D Heisenberg model: response at low temperatures

Authors

Plekhanov, Evgeny

Avella, Adolfo

Mancini, Ferdinando

Description

We present the results of exact diagonalization calculations of the isolated and isothermal on-site static susceptibilities in the anisotropic extended Heisenberg model on a linear chain with periodic boundary conditions. Based on the ergodicity considerations we conclude that the isothermal susceptibility will diverge as $T\to 0$ both in finite clusters and in the bulk system in two non-ergodic regions of the phase diagram of the system.
reported at the International Conference on Magnetism, August 20-25, 2006 Kyoto, Japan