Mapping of few-electron wave-functions in semiconductor nanocrystals - evidence of exchange interaction
| dc.creator | Tews, Michael | |
| dc.creator | Pfannkuche, Daniela | |
| dc.date | 2002-09-04 | |
| dc.date.accessioned | 2026-07-25T22:20:33Z | |
| dc.description | The influence of the tip-substrate bias induced electric field in a scanning-tunneling-spectroscopy experiment on charged InAs nanocrystals is studied. Calculating the ground and first excited many-particle state for five electrons occupying the quantum dot reveals a Stark-induced reordering of states by increasing the electric field strength. It is shown that this reordering of states is accompanied by a symmetry change of the local density of states (LDOS), which in principal is observable in a wave-function mapping experiment. Since in the usually performed experiments the electric field can not be directly controlled, we investigate the crystal size dependence of the 5-electron LDOS symmetry. It is found that the symmetry changes from spherical to torus-like by increasing the nanocrystal radius. | |
| dc.description | 8 pages, 6 figures, LaTeX, iopart, in proceedings of the 26th ICPS | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0209102 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0209102 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/88094 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Mapping of few-electron wave-functions in semiconductor nanocrystals - evidence of exchange interaction | |
| dc.type | text |