Survival of Φ0/2 periodicity in presence of incoherence in asymmetric Aharonov–Bohm rings

Magneto conductance oscillations periodic in flux with periodicity Φ0 and Φ0/2 are seen in asymmetric Aharonov–Bohm rings as a function of density of electrons or Fermi wave vector. Dephasing of these oscillations is incorporated using a simple approach of wave attenuation. In this work, we study how the excitation of the Φ0/2 oscillations and the accompanying phase change of π are affected by dephasing. Our results show that the Φ0/2 oscillations survive incoherence, i.e. dephasing, albeit with reduced visibility while incoherence is also unable to obliterate the phase change of π.