The role of momentum conservation on the tunneling between a two-dimensional electron gas and self-assembled quantum dots

The electron tunneling rates between a two-dimensional electron gas (2DEG) and self-assembled InAs quantum dots are studied by applying a magnetic field perpendicular to the tunneling direction. For both the ground and the first excited states, the tunneling rate can be modified by a magnetic field....

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2022-08, Vol.132 (6)
Main Authors: Zhou, Daming, Kerski, Jens, Beckel, Andreas, Geller, Martin, Lorke, Axel, Ludwig, Arne, Wieck, Andreas D., Chen, Xiaoshuang, Lu, Wei
Format: Article
Language:English
Subjects:
Applied physics
Electron gas
Electron tunneling
Fermi surfaces
Magnetic fields
Momentum
Quantum dots
Self-assembly
Wave functions
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The electron tunneling rates between a two-dimensional electron gas (2DEG) and self-assembled InAs quantum dots are studied by applying a magnetic field perpendicular to the tunneling direction. For both the ground and the first excited states, the tunneling rate can be modified by a magnetic field. The field dependence of both the s and p state tunneling rates can be explained with a model, based on momentum matching between the Fermi surface of the 2DEG and the wave function of the quantum dots in momentum space. The results, together with the comparison between charging and discharging rates, provide insight into the filling sequence of the p-state electrons.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0098561