Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 20: Poster Session: Correlated Electrons 2

TT 20.17: Poster

Montag, 20. März 2017, 15:00–19:00, P2-OG1

Spin dynamics in classical XXZ chains with disorder — •Tim Dierker and Robin Steinigeweg — University Osnabrück

The transport of magnetization is analyzed for the classical XXZ spin chain with a random magnetic field. In order to do so, the Hamiltonian equations of motion are solved numerically for initial states realizing harmonic-like magnetization profiles with small amplitudes and with random phases. Without disorder, the resulting dynamics are observed to be diffusve in a hydrodynamic regime starting at comparativley small times and wave lengths [1]. The influence of disorder on these dynamics is studied in the entire range from weak to strong disorders.

[1] R. Steinigeweg, Europhysics Letters 97, 67001 (2012)