Interplay of Kondo effect and strong spin-orbit coupling in multi-hole ultraclean carbon nanotubes

Autor:	Cleuziou, J. P., N'Guyen, N. V., Florens, S., Wernsdorfer, W.
Rok vydání:	2013
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. Lett. 111, 136803 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.111.136803
Popis:	We report on cotunneling spectroscopy magnetoconductance measurements of multi-hole ultraclean carbon nanotube quantum dots in the SU(4) Kondo regime with strong spin-orbit coupling. Successive shells show a gradual weakening of the Kondo effect with respect to the spin-orbital splittings, leading to an evolution from SU(4) to SU(2) symmetry with a suppressed conductance at half shell filling. The extracted energy level spectrum, overally consistent with negligible disorder in the nanotube, shows in the half filled case large renormalizations due to Coulombian effects. Comment: 5 pages, 4 figures, 1 supplementary file
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1310.6530 Zobrazit plný text záznamu View this record from Arxiv