Abstract
We present measurements of transport through two tunnel-coupled quantum dots of different sizes connected in series in a strong, variable, perpendicular magnetic field. Double-dot conductance was measured both as a function of magnetic field, which was varied across the filling factor quantum Hall plateau, and as a function of charge induced evenly on the two dots. The conductance peaks undergo position shifts and height modulations as the magnetic field is varied. These shifts and modulations form a pattern that repeats over large ranges of magnetic field and with the addition of double-dot charge. The robust pattern repetition is consistent with a frequency locking effect.
- Received 20 November 1998
DOI:https://doi.org/10.1103/PhysRevB.59.10744
©1999 American Physical Society