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 → 0 both in finite clusters and in the bulk system in two non-ergodic regions of the phase diagram of the system. © 2006 Elsevier B.V. All rights reserved.
Ergodicity of the extended anisotropic 1D Heisenberg model: Response at low temperatures
PLEKHANOV, Evgeny;AVELLA, Adolfo;MANCINI, Ferdinando
2007-01-01
Abstract
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 → 0 both in finite clusters and in the bulk system in two non-ergodic regions of the phase diagram of the system. © 2006 Elsevier B.V. All rights reserved.File in questo prodotto:
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