We report magnetotransport measurements on a coupled, triple-layer electron system subjected to either perpendicular (B⊥) or parallel (B∥) magnetic fields. The B⊥ data reveal an abrupt collapse of the v=1 quantum Hall state as we increase the density in the side-wells. The results suggest the system makes a triple-to a double-layer transition at high B⊥ which is driven by interlayer electron-electron interactions. In B∥ data, we observe two types of resistance oscillations as we decrease front-gate bias: One corresponds to the passage of the Fermi level through the partial energy gaps arising from the B∥-induced level anticrossings, the other is due to the enhanced Coulomb scattering as the system makes layer transitions.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry