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Evolution and destruction of the Kondo effect in a capacitively coupled double dot system

Abstract:

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-Fer...

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Publication status:
Published

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Publisher copy:
10.1142/S0217979207043580

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Institution:
University of Oxford
Division:
MPLS
Department:
Chemistry
Sub department:
Physical & Theoretical Chem
Role:
Author
Host title:
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
Volume:
21
Issue:
13-14
Pages:
2191-2203
Publication date:
2007-05-30
DOI:
EISSN:
1793-6578
ISSN:
0217-9792
Keywords:
Pubs id:
pubs:40547
UUID:
uuid:d2cbb355-6c0c-4c2d-9d4c-788d24d8ac74
Local pid:
pubs:40547
Source identifiers:
40547
Deposit date:
2012-12-19

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