Aharonov–Bohm oscillations in quantum dots: precise departures fromh / eperiodicity
✍ Scribed by J.P. Bird; M. Stopa; R.P. Taylor; R. Newbury; Y. Aoyagi; T. Sugano
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 190 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0749-6036
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✦ Synopsis
We investigate precise departures from h/e periodicity in Aharonov-Bohm oscillations observed in the low temperature magneto-resistance of quantum dots. Period-doubling is apparent over well defined ranges of magnetic field, outside of which the oscillations revert to their single period. The precise nature of the doubling is reflected in a Fourier analysis of the oscillations, and is also confirmed by the results of self-consistent calculations. While the origin of this effect remains unclear we discuss several possible mechanisms, and also briefly consider the conditions necessary for observation of frequency-doubled oscillations.