Collective Phenomena in Defect Crystals

Details Collective Phenomena in Defect Crystals Collective Phenomena in Defect Crystals

2000-04-25

arxiv.org/abs/cond-mat/0004412v2

Physics

Condensed Matter

Statistical Mechanics

13 pages, 9 eps figures included

Scientific paper

10.1103/PhysRevB.62.12069

We investigate effects of interactions between substitutional defects on the properties of defect crystals at low temperatures, where defect motion is governed by quantum effects. Both, thermal and dynamical properties are considered. The influence of interactions on defect motion is described via a collective effect. Our treatment is semiclassical in the sense that we analyze collective effects in a classical setting, and analyze the influence on quantized defect motion only thereafter. Our theory describes a crossover to glassy behavior at sufficiently high defect concentration. Our approach is meant to be general. For the sake of definiteness, we evaluate most of our results with parameters appropriate for Li-doped KCl crystals.

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