Evolution and destruction of the Kondo effect in a capacitively coupled double dot system
We consider the simplest example of a double quantum dot system: two equivalent, capacitively coupled single-level dots, each coupled to its own lead. Focussing on a regime of two electrons on the double dot, a rich range of behaviour is found on increasing the interdot coupling: first a crossover f...
| Main Authors: | , |
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| Format: | Conference item |
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2007
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| _version_ | 1797096651815387136 |
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| author | Logan, D Galpin, MR |
| author_facet | Logan, D Galpin, MR |
| author_sort | Logan, D |
| collection | OXFORD |
| description | We consider the simplest example of a double quantum dot system: two equivalent, capacitively coupled single-level dots, each coupled to its own lead. Focussing on a regime of two electrons on the double dot, a rich range of behaviour is found on increasing the interdot coupling: first a crossover from spin- to charge-Kondo physics, via an intermediate SU(4) state with entangled spin and charge degrees of freedom; followed by a quantum phase transition of Kosterlitz-Thouless type to a non-Fermi liquid 'charge-ordered' phase with finite residual entropy and anomalous transport properties. The numerical renormalization group method, coupled with simple physical arguments, is employed to obtain a detailed understanding of the problem. © World Scientific Publishing Company. |
| first_indexed | 2024-03-07T04:44:34Z |
| format | Conference item |
| id | oxford-uuid:d2cbb355-6c0c-4c2d-9d4c-788d24d8ac74 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:44:34Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:d2cbb355-6c0c-4c2d-9d4c-788d24d8ac742022-03-27T08:06:37ZEvolution and destruction of the Kondo effect in a capacitively coupled double dot systemConference itemhttp://purl.org/coar/resource_type/c_5794uuid:d2cbb355-6c0c-4c2d-9d4c-788d24d8ac74Symplectic Elements at Oxford2007Logan, DGalpin, MRWe consider the simplest example of a double quantum dot system: two equivalent, capacitively coupled single-level dots, each coupled to its own lead. Focussing on a regime of two electrons on the double dot, a rich range of behaviour is found on increasing the interdot coupling: first a crossover from spin- to charge-Kondo physics, via an intermediate SU(4) state with entangled spin and charge degrees of freedom; followed by a quantum phase transition of Kosterlitz-Thouless type to a non-Fermi liquid 'charge-ordered' phase with finite residual entropy and anomalous transport properties. The numerical renormalization group method, coupled with simple physical arguments, is employed to obtain a detailed understanding of the problem. © World Scientific Publishing Company. |
| spellingShingle | Logan, D Galpin, MR Evolution and destruction of the Kondo effect in a capacitively coupled double dot system |
| title | Evolution and destruction of the Kondo effect in a capacitively coupled double dot system |
| title_full | Evolution and destruction of the Kondo effect in a capacitively coupled double dot system |
| title_fullStr | Evolution and destruction of the Kondo effect in a capacitively coupled double dot system |
| title_full_unstemmed | Evolution and destruction of the Kondo effect in a capacitively coupled double dot system |
| title_short | Evolution and destruction of the Kondo effect in a capacitively coupled double dot system |
| title_sort | evolution and destruction of the kondo effect in a capacitively coupled double dot system |
| work_keys_str_mv | AT logand evolutionanddestructionofthekondoeffectinacapacitivelycoupleddoubledotsystem AT galpinmr evolutionanddestructionofthekondoeffectinacapacitivelycoupleddoubledotsystem |