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Pauli spin blockade in carbon nanotube double quantum dots
- Buitelaar, M. R. (author)
-
- Fransson, J. (author)
- Uppsala universitet,Institutionen för fysik och materialvetenskap
- Cantone, A. L. (author)
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- Smith, C. G. (author)
- Anderson, D. (author)
- Jones, G. A. C. (author)
- Ardavan, A. (author)
- Khlobystov, A. N. (author)
- Watt, A. A. R. (author)
- Porfyrakis, K. (author)
- Briggs, G. A. D. (author)
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- (creator_code:org_t)
- 2008
- 2008
- English.
- In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 77:24, s. 245439-
- Journal article (peer-reviewed)
Abstract
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- We report Pauli spin blockade in a carbon nanotube double quantum dot defined by tunnel barriers at the contacts and a structural defect in the nanotube. 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.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Physics
- Fysik
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- ref (subject category)
- art (subject category)
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- Buitelaar, M. R.
- Fransson, J.
- Cantone, A. L.
- Smith, C. G.
- Anderson, D.
- Jones, G. A. C.
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- Ardavan, A.
- Khlobystov, A. N ...
- Watt, A. A. R.
- Porfyrakis, K.
- Briggs, G. A. D.
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- Uppsala University
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