Abstract
We fabricated a unique hybrid vertical-lateral double dot device with two dots coupled in parallel to study the excitation energy spectra with the number of electrons in each dot and inter-dot level detuning as parameters. We measured the charging diagram for a finite bias voltage and observed the tunnel-coupled bonding state and anti-bonding state. The separation between the two states is a direct measure of the inter-dot tunnel coupling energy. We use this energy and other characteristic energies derived from the charging diagram to characterize the exchange interaction energy.
Original language | English |
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Pages (from-to) | 1238-1240 |
Number of pages | 3 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 40 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2008 Mar 1 |
Keywords
- Bonding and anti-bonding states
- Ground and excited states
- Tunnel coupling
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics