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Fast and slow dynamics in the one-dimensional Φ 4 lattice model: A molecular-dynamics study

1993; American Physical Society; Volume: 47; Issue: 22 Linguagem: Inglês

10.1103/physrevb.47.14910

1095-3795

Sergej Flach, Jens Siewert,

Spectroscopy and Quantum Chemical Studies

The separation of dyanamics into slow and fast components for the one-dimensional ${\mathrm{\ensuremath{\Phi}}}^{4}$ lattice model with a nearest-neighbor interaction is studied. We find two dynamic scaling laws for the displacement-displacement correlator in the strong-interaction case. The temperature window where scaling appears has a nonzero lower bound. There exist no analogies between the found scaling properties and structural relaxation processes in undercooled liquids near the liquid-glass transition. This fact seems to be due to the presence of static on-site double-well potentials. In the case of weak interaction only one dynamic scaling law seems to appear.