Pseudo-open-orbit in disordered quantum-wire array: Disappearance of cyclotron resonance

The dynamical conductivity of a lateral superlattice with disorder in period, etc., in magnetic fields are calculated using the Boltzmann equation. In a weak magnetic field, the normal cyclotron resonance disappears and the multi-peak structure appears due to the resonance associated with the formation of a pseudo-open-orbit caused by diffuse Bragg scattering. The normal cyclotron resonance is recovered in sufficiently high magnetic fields due to magnetic breakthrough.