Pauli spin blockade in carbon nanotube double quantum dots
| Autor: | Buitelaar, M. R., Fransson, J., Cantone, A. L., Smith, C. G., Anderson, D., Jones, G. A. C., Ardavan, A., Khlobystov, A. N., Watt, A. A. R., Porfyrakis, K., Briggs, G. A. D. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.77.245439 |
| Popis: | We report Pauli spin blockade in an impurity defined carbon nanotube double quantum dot. We observe a pronounced current suppression for negative source-drain bias voltages which is investigated for both symmetric and asymmetric coupling of the quantum dots to the leads. The measured differential conductance agrees well with a theoretical model of a double quantum dot system in the spin-blockade regime which allows us to estimate the occupation probabilities of the relevant singlet and triplet states. This work shows that effective spin-to-charge conversion in nanotube quantum dots is feasible and opens the possibility of single-spin readout in a material that is not limited by hyperfine interaction with nuclear spins. Comment: 7 pages, 5 figures |
| Databáze: | arXiv |
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