Spin diffusion in one-dimensional antiferromagnets

1 August 1996

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 54 (5) , 3311-3321
https://doi.org/10.1103/physrevb.54.3311

Abstract

We study the problem of spin diffusion in magnetic systems without long-range order. We discuss the example of the one-dimensional spin chain. For the system described by the Heisenberg Hamiltonian we show that there are no diffusive excitations. However, the addition of an arbitrarily small dissipation term, such as the spin-phonon interaction, leads to diffusive excitations in the long-time limit. For those excitations we estimate the spin-diffusion coefficient by means of the renormalization group analysis. © 1996 The American Physical Society.

Keywords

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