Interlayer interference in double wells in a tilted magnetic field

Abstract

Magnetotransport measurements on bilayer electron systems reveal repeated reentrance of the resistance minima at filling factors $\ensuremath{\nu}=4N+1$ and $\ensuremath{\nu}=4N+3$, where $N$ is the Landau index number, in the tilted magnetic field. At high filling factors, the Shubnikov-de Haas oscillations exhibit beating effects at certain tilt angles. We attribute such behavior to oscillations of the tunneling gap due to Aharonov-Bohm interference effect between cyclotron orbits in different layers. The interplay between quantum and quasiclassical regimes is established.