Aharonov-Bohm Oscillations in Singly-Connected Disordered Conductors
  We show that transport and thermodynamic properties of \emph{singly-connected} disordered conductors exhibit quantum Aharonov - Bohm oscillations with the total magnetic flux through the system. The oscillations are associated with the interference contribution from a special class of electron trajectories confined to the surface of the sample. 
I.L. Aleiner, A. V. Andreev, and V. Vinokur
cond-mat.mes-hall cond-mat.supr-con