Details
| Original language | English |
|---|---|
| Article number | 233402 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 72 |
| Issue number | 23 |
| Publication status | Published - 15 Dec 2005 |
Abstract
With noninvasive methods, we investigate ground and excited states of a lateral quantum dot. Charge detection via a quantum point contact is used to map the dot dynamics in a regime where the current through the dot is too low for transport measurements. In this way we investigate and compare the tunneling rates from the dot to source and drain. We find a symmetry line on which the tunneling rates to both leads are equal. In this situation ground states as well as excited states influence the mean charge of the dot. A detailed study in this regime reveals that the coupling symmetry depends on the number of states contributing to transport and on the spatial distribution of individual states.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B - Condensed Matter and Materials Physics, Vol. 72, No. 23, 233402, 15.12.2005.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Coupling symmetry of quantum dot states
AU - Rogge, M. C.
AU - Harke, B.
AU - Fricke, C.
AU - Hohls, F.
AU - Reinwald, M.
AU - Wegscheider, W.
AU - Haug, R. J.
PY - 2005/12/15
Y1 - 2005/12/15
N2 - With noninvasive methods, we investigate ground and excited states of a lateral quantum dot. Charge detection via a quantum point contact is used to map the dot dynamics in a regime where the current through the dot is too low for transport measurements. In this way we investigate and compare the tunneling rates from the dot to source and drain. We find a symmetry line on which the tunneling rates to both leads are equal. In this situation ground states as well as excited states influence the mean charge of the dot. A detailed study in this regime reveals that the coupling symmetry depends on the number of states contributing to transport and on the spatial distribution of individual states.
AB - With noninvasive methods, we investigate ground and excited states of a lateral quantum dot. Charge detection via a quantum point contact is used to map the dot dynamics in a regime where the current through the dot is too low for transport measurements. In this way we investigate and compare the tunneling rates from the dot to source and drain. We find a symmetry line on which the tunneling rates to both leads are equal. In this situation ground states as well as excited states influence the mean charge of the dot. A detailed study in this regime reveals that the coupling symmetry depends on the number of states contributing to transport and on the spatial distribution of individual states.
UR - http://www.scopus.com/inward/record.url?scp=29744447689&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.72.233402
DO - 10.1103/PhysRevB.72.233402
M3 - Article
AN - SCOPUS:29744447689
VL - 72
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 23
M1 - 233402
ER -