Quantum phase transition in quantum dot trimers
We investigate a system of three tunnel-coupled semiconductor quantum dots in a triangular geometry, one of which is connected to a metallic lead, in the regime where each dot is essentially singly occupied. Both ferromagnetic and antiferromagnetic spin- 1 2 Kondo regimes, separated by a quantum pha...
| मुख्य लेखकों: | , , |
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| स्वरूप: | Journal article |
| भाषा: | English |
| प्रकाशित: |
2009
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| _version_ | 1826306950589054976 |
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| author | Mitchell, A Jarrold, T Logan, D |
| author_facet | Mitchell, A Jarrold, T Logan, D |
| author_sort | Mitchell, A |
| collection | OXFORD |
| description | We investigate a system of three tunnel-coupled semiconductor quantum dots in a triangular geometry, one of which is connected to a metallic lead, in the regime where each dot is essentially singly occupied. Both ferromagnetic and antiferromagnetic spin- 1 2 Kondo regimes, separated by a quantum phase transition, are shown to arise on tuning the interdot tunnel couplings and should be accessible experimentally. Even in the ferromagnetically-coupled local moment phase, the Kondo effect emerges in the vicinity of the transition at finite temperatures. Physical arguments and numerical renormalization group techniques are used to obtain a detailed understanding of the problem. © 2009 The American Physical Society. |
| first_indexed | 2024-03-07T06:55:41Z |
| format | Journal article |
| id | oxford-uuid:fe14d25a-d83d-4b31-9829-6db213738f55 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:55:41Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:fe14d25a-d83d-4b31-9829-6db213738f552022-03-27T13:33:32ZQuantum phase transition in quantum dot trimersJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:fe14d25a-d83d-4b31-9829-6db213738f55EnglishSymplectic Elements at Oxford2009Mitchell, AJarrold, TLogan, DWe investigate a system of three tunnel-coupled semiconductor quantum dots in a triangular geometry, one of which is connected to a metallic lead, in the regime where each dot is essentially singly occupied. Both ferromagnetic and antiferromagnetic spin- 1 2 Kondo regimes, separated by a quantum phase transition, are shown to arise on tuning the interdot tunnel couplings and should be accessible experimentally. Even in the ferromagnetically-coupled local moment phase, the Kondo effect emerges in the vicinity of the transition at finite temperatures. Physical arguments and numerical renormalization group techniques are used to obtain a detailed understanding of the problem. © 2009 The American Physical Society. |
| spellingShingle | Mitchell, A Jarrold, T Logan, D Quantum phase transition in quantum dot trimers |
| title | Quantum phase transition in quantum dot trimers |
| title_full | Quantum phase transition in quantum dot trimers |
| title_fullStr | Quantum phase transition in quantum dot trimers |
| title_full_unstemmed | Quantum phase transition in quantum dot trimers |
| title_short | Quantum phase transition in quantum dot trimers |
| title_sort | quantum phase transition in quantum dot trimers |
| work_keys_str_mv | AT mitchella quantumphasetransitioninquantumdottrimers AT jarroldt quantumphasetransitioninquantumdottrimers AT logand quantumphasetransitioninquantumdottrimers |