Interference phenomena and coherence in the deformable model of sliding charge density waves.
01 January 1986
We study how a deformable charge density wave in the presence of random impurities responds to driving fields with both ac and dc components. Features in the differential resistivity are found when an internal frequency proportional to the velocity is either a harmonic or subharmonic of the driving frequency. Even infinitely large systems can exhibit true mode-locking to the driving frequency. We discuss whether the behavior can be described using an equation of motion for a single effective degree of freedom.