Zero-bias conductance in carbon nanotube quantum dots.
We present numerical renormalization group calculations for the zero-bias conductance of quantum dots made from semiconducting carbon nanotubes. These explain and reproduce the thermal evolution of the conductance for different groups of orbitals, as the dot-lead tunnel coupling is varied and the sy...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2008
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| _version_ | 1797101840245981184 |
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| author | Anders, F Logan, D Galpin, MR Finkelstein, G |
| author_facet | Anders, F Logan, D Galpin, MR Finkelstein, G |
| author_sort | Anders, F |
| collection | OXFORD |
| description | We present numerical renormalization group calculations for the zero-bias conductance of quantum dots made from semiconducting carbon nanotubes. These explain and reproduce the thermal evolution of the conductance for different groups of orbitals, as the dot-lead tunnel coupling is varied and the system evolves from correlated Kondo behavior to more weakly correlated regimes. For integer fillings N=1, 2, 3 of an SU(4) model, we find universal scaling behavior of the conductance that is distinct from the standard SU(2) universal conductance, and concurs quantitatively with experiment. Our results also agree qualitatively with experimental differential conductance maps. |
| first_indexed | 2024-03-07T05:57:36Z |
| format | Journal article |
| id | oxford-uuid:eb102255-755e-46f2-bf5a-bf19ecedfd84 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:57:36Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:eb102255-755e-46f2-bf5a-bf19ecedfd842022-03-27T11:06:58ZZero-bias conductance in carbon nanotube quantum dots.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:eb102255-755e-46f2-bf5a-bf19ecedfd84EnglishSymplectic Elements at Oxford2008Anders, FLogan, DGalpin, MRFinkelstein, GWe present numerical renormalization group calculations for the zero-bias conductance of quantum dots made from semiconducting carbon nanotubes. These explain and reproduce the thermal evolution of the conductance for different groups of orbitals, as the dot-lead tunnel coupling is varied and the system evolves from correlated Kondo behavior to more weakly correlated regimes. For integer fillings N=1, 2, 3 of an SU(4) model, we find universal scaling behavior of the conductance that is distinct from the standard SU(2) universal conductance, and concurs quantitatively with experiment. Our results also agree qualitatively with experimental differential conductance maps. |
| spellingShingle | Anders, F Logan, D Galpin, MR Finkelstein, G Zero-bias conductance in carbon nanotube quantum dots. |
| title | Zero-bias conductance in carbon nanotube quantum dots. |
| title_full | Zero-bias conductance in carbon nanotube quantum dots. |
| title_fullStr | Zero-bias conductance in carbon nanotube quantum dots. |
| title_full_unstemmed | Zero-bias conductance in carbon nanotube quantum dots. |
| title_short | Zero-bias conductance in carbon nanotube quantum dots. |
| title_sort | zero bias conductance in carbon nanotube quantum dots |
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