|
|||||
|
|
Shell structure of a circular quantum dot in weak magnetic fields |
|
| Authors: | SM Reimann M Persson PE Lindelof M Brack |
| Institution: | 1. Institut für Theoretische Physik, Universit?t Regensburg, D-93040, Regensburg, Germany 2. Department of Physics, Chalmers University of Technology, S-41296, G?teborg, Sweden 3. The Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen, Denmark |
| Abstract: | The conductance of a circular quantum dot in a two-dimensional electron gas of a GaAlAs/GaAs heterostructure has been measured. Conductance oscillations as functions both of the magnetic field B and of the size of a dot confining about 1000 electrons are related to the formation of electronic shell structure. Modeling the dot by a circular billiard, we interpret the results semiclassically in terms of periodic orbit theory, providing a simple explanation of the B-periodic oscillations. A comparison to a harmonic confinement suitable for smaller quantum dots is given. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |