Abstract
We have experimentally investigated the hole states in a gated vertical strained quantum dot. We demonstrate the inhomogeneous-strain relaxation on the lateral surface creates a ringlike potential near the perimeter of the dot, which can confine hole states exhibiting quantum ring characteristics. The magnetotunneling spectroscopy exhibits the predicted periodicity of energy states in , but the magnitude of the energy shifts is larger than predicted by simple ring theory. Our results suggest a new way to fabricate and study quantum ring structures.
- Received 30 January 2002
- Publisher error corrected 13 August 2002
DOI:https://doi.org/10.1103/PhysRevLett.89.096804
©2002 American Physical Society
Corrections
13 August 2002