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arxiv: 0704.1979 · v1 · submitted 2007-04-16 · ❄️ cond-mat.mes-hall · cond-mat.str-el

SU(2) and SU(4) Kondo effect in double quantum dots

classification ❄️ cond-mat.mes-hall cond-mat.str-el
keywords phasesdifferentdiscussdoublekondoquantumcharacteristiccompetition
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We investigate serial double quantum dot systems with on-site and inter-site interaction by means of Sch\"onhammer-Gunnarsson projection-operator method. The ground state is established by the competition between extended Kondo phases and localized singlet phases in spi$ degrees of freedom. We present and discuss different phases, as discerned by characteristic correlation functions. We discuss also how different phases would be seen in linear transport measurements.

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