Survival of $Φ_{0}/2$ periodicity in presence of incoherence in asymmetric Aharonov-Bohm rings

Details Survival of $Φ_{0}/2$ periodicity in presence of incoherence in asymmetric Aharonov-Bohm rings Survival of $Φ_{0}/2$ periodicity in presence of incoherence in asymmetric Aharonov-Bohm rings

2002-05-31

arxiv.org/abs/cond-mat/0205662v2

Solid State Commmun. 124, 331 (2002).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1016/S0038-1098(02)00499-4

Magneto conductance oscillations periodic in flux with periodicity $\Phi_{0}$ and $\Phi_{0}/2$ 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 $\Phi_{0}/2$ oscillations and the accompanying phase change of $\pi$ are affected by dephasing. Our results show that the $\Phi_{0}/2$ oscillations survive incoherence, i.e., dephasing, albeit with reduced visibility while incoherence is also unable to obliterate the phase change of $\pi$.

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