Abstract
By studying the resonant tunneling of electrons through self-assembled ring-shaped (InGa)As quantum dots embedded in the quantum well of an heterostructure, we find evidence for the existence of excited states of the quantum dots which exhibit a -like character along the growth direction . The states are investigated by magnetotunneling spectroscopy with magnetic fields applied parallel and perpendicular to .
- Received 11 March 2005
DOI:https://doi.org/10.1103/PhysRevB.72.085309
©2005 American Physical Society