Pauli spin blockade in carbon nanotube double quantum dots
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 coupl...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2008
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| _version_ | 1826259680595279872 |
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| author | Buitelaar, MR Fransson, J Cantone, A Smith, C Anderson, D Jones, G Ardavan, A Khlobystov, A Watt, A Porfyrakis, K Briggs, G |
| author_facet | Buitelaar, MR Fransson, J Cantone, A Smith, C Anderson, D Jones, G Ardavan, A Khlobystov, A Watt, A Porfyrakis, K Briggs, G |
| author_sort | Buitelaar, MR |
| collection | OXFORD |
| description | 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. © 2008 The American Physical Society. |
| first_indexed | 2024-03-06T18:53:39Z |
| format | Journal article |
| id | oxford-uuid:1116e9b3-69d2-4771-bade-6e39b0f86490 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:53:39Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:1116e9b3-69d2-4771-bade-6e39b0f864902022-03-26T10:00:12ZPauli spin blockade in carbon nanotube double quantum dotsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1116e9b3-69d2-4771-bade-6e39b0f86490EnglishSymplectic Elements at Oxford2008Buitelaar, MRFransson, JCantone, ASmith, CAnderson, DJones, GArdavan, AKhlobystov, AWatt, APorfyrakis, KBriggs, GWe 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. © 2008 The American Physical Society. |
| spellingShingle | Buitelaar, MR Fransson, J Cantone, A Smith, C Anderson, D Jones, G Ardavan, A Khlobystov, A Watt, A Porfyrakis, K Briggs, G Pauli spin blockade in carbon nanotube double quantum dots |
| title | Pauli spin blockade in carbon nanotube double quantum dots |
| title_full | Pauli spin blockade in carbon nanotube double quantum dots |
| title_fullStr | Pauli spin blockade in carbon nanotube double quantum dots |
| title_full_unstemmed | Pauli spin blockade in carbon nanotube double quantum dots |
| title_short | Pauli spin blockade in carbon nanotube double quantum dots |
| title_sort | pauli spin blockade in carbon nanotube double quantum dots |
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