Spatial mapping and manipulation of two tunnel-coupled quantum dots
| Autor: | Thomas Ihn, Magdalena Huefner, Bruno Kueng, Klaus Ensslin, Matthias Reinwald, S. Schnez, Werner Wegscheider |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Quantum point contact FOS: Physical sciences Coulomb blockade Heterojunction Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Molecular physics Electronic Optical and Magnetic Materials Quantum dot laser Quantum dot Quantum state Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Image resolution |
| Zdroj: | Physical Review B. 83 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.83.235326 |
| Popis: | The metallic tip of a scanning force microscope operated at $300\text{}\mathrm{m}\mathrm{K}$ is used to locally induce a potential in a fully controllable double quantum dot defined via local anodic oxidation in a GaAs/AlGaAs heterostructure. Using scanning gate techniques we record spatial images of the current through the sample for different numbers of electrons on the quantum dots (i.e., for different quantum states). Owing to the spatial resolution of current maps, we are able to determine the spatial position of the individual quantum dots, and investigate their apparent relative shifts due to the voltage applied to a single gate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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