| Autor: |
Shibata, K., Buizert, C., Oiwa, A., Hirakawa, K., Tarucha, S. |
| Rok vydání: |
2007 |
| Předmět: |
|
| Zdroj: |
APPLIED PHYSICS LETTERS 91, 112102 (2007) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1063/1.2779970 |
| Popis: |
We have fabricated superconductor-quantum dot-superconductor (SC-QD-SC) junctions by using SC aluminum electrodes with narrow gaps laterally contacting a single self-assembled InAs QD. The fabricated junctions exhibited clear Coulomb staircases and Coulomb oscillations at 40 mK. Furthermore, clear suppression in conductance was observed for the source-drain voltage $|V_{\rm SD}| < 2\Delta/e$, where $\Delta$ is the SC energy gap of Al. The absence of Josephson current that flows through QDs is due to the strong Coulomb interaction and non-negligible thermal fluctuation in our measurement system. |
| Databáze: |
arXiv |
| Externí odkaz: |
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