Pauli spin blockade in carbon nanotube double quantum dots
- Resource Type
- Working Paper
- Authors
- 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.
- Source
- Subject
- Condensed Matter - Mesoscale and Nanoscale Physics
- Language
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