Kondo effects in a triangular triple quantum dot with lower symmetries

Autor:	Oguri, A., Amaha, S., Nishikawa, Y., Numata, T., Shimamoto, M., Hewson, A. C., Tarucha, S.
Rok vydání:	2010
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev B 83, 205304 (2011)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.83.205304
Popis:	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. Comment: 18 pages; 21 figures (Figs.17 and 20 are added)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1008.1821 Zobrazit plný text záznamu View this record from Arxiv