Aaronov-Bohm oscillations with normal and superconducting flux quanta in hopping conductivity
Nguyen V. L., Spivak B. Z., Shklovskii B. I.
It is shown that in the hopping-conductivity region there are oscillations in the resistance as a function of the magnetic flux spanning the sample (the Aaronov-Bohm effect). The oscillation period may be equal to the normal or superconducting flux quantum. The transition between the two regimes is a second-order phase transition.