2002/05/31 by Colin Benjamin, Swarnali Bandopadhyay, A. M. Jayannavar
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1016/s0038-1098(02)00499-4
published as Solid State Commmun. 124, 331 (2002). · 4 pages, 3 figures
arxiv created 2003/02/08 · arxiv updated 2009/11/30
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.