Abstract
We report a clear and sudden period doubling in the Aharonov-Bohm oscillations (ABO), observed in the low-temperature magneto-resistance of a small quantum dot. The doubling occurs over a well-defined range of magnetic field, outside of which the ABO revert back to their single period. The precise nature of the doubling is reflected in the Fourier spectra of the oscillations, and suggests an interpretation in terms of the single-particle energy-level spectrum of the dot.
- Received 2 October 1995
DOI:https://doi.org/10.1103/PhysRevB.53.3642
©1996 American Physical Society