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Quantum phase transition in capacitively coupled double quantum dots.

Abstract:

We investigate two equivalent, capacitively coupled semiconducting quantum dots, each coupled to its own lead, in a regime where there are two electrons on the double dot. With increasing interdot coupling, a rich range of behavior is uncovered: 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 wi...

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Institution:
University of Oxford
Department:
Oxford, MPLS, Chemistry, Physical and Theoretical Chem
Role:
Author
Journal:
Physical review letters
Volume:
94
Issue:
18
Pages:
186406
Publication date:
2005-05-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:10cea3ef-14d5-4858-a18a-ab3c43a12255
Source identifiers:
33105
Local pid:
pubs:33105
Language:
English
Keywords:

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