Kondo effects in a triangular triple quantum dot with lower symmetries

Details Kondo effects in a triangular triple quantum dot with lower symmetries Kondo effects in a triangular triple quantum dot with lower symmetries

2010-08-11

arxiv.org/abs/1008.1821v2

Phys. Rev B 83, 205304 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

18 pages; 21 figures (Figs.17 and 20 are added)

Scientific paper

The triangular triple quantum dot is an interesting system which can demonstrate various types of the Kondo effects, such as the one due to the local spin S=1 moment caused by the Nagaoka ferromagnetic mechanism and the SU(4) Kondo effect. We theoretically study the low-temperature properties and the Kondo energy scale of the triangular triple quantum dot, using the Wilson numerical renormalization group. We have explored a wide parameter region of the electron-filling and distortions which break the symmetry of an equilateral structure. Our results give a comprehensive overview of how the Kondo behavior varies in the different the regions in the wide parameter space of the triangular triple quantum dot.

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