Model for the Splitting of an Incommensurate Modulation under the Influence of a Frozen Defect-Density-Wave

1 January 1985

journal article
Published by IOP Publishing in Japanese Journal of Applied Physics

Vol. 24 (S2)
https://doi.org/10.7567/jjaps.24s2.847

Abstract

We report a theoretical study of the influence of a defect-density-wave on an incommensurate modulation by considering a model in which the modulation is submitted to two competing lock-in potentials with different periodicities. We show that our model can be transformed into the Frenkel-Kontorowa problem. As consequences, the modulation can be described as a solitons distribution whose spacing is not constant but modulated. The temperature dependence of the solitons density is represented by a devil's staircase and the Fourier spectrum of the modulation splits into several components. The case of Rb₂ZnBr₄ is discussed.

Keywords

MODEL
DEFECT
WAVE
SPLITTING
INCOMMENSURATE
SOLITONS
STAIRCASE
LOCK
FROZEN

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