Intra- and inter-shell Kondo effects in carbon nanotube quantum dots

被引：6

作者：

Krychowski, Damian ^{[1
]}

Lipinski, Stanislaw ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Mol Phys, M Smoluchowskiego 17, PL-60179 Poznan, Poland

来源：

EUROPEAN PHYSICAL JOURNAL B | 2018年 / 91卷 / 01期

关键词：

SPIN-ORBIT INTERACTION; TRANSPORT; BLOCKADE;

D O I：

10.1140/epjb/e2017-80547-y

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The linear response transport properties of carbon nanotube quantum dot in the strongly correlated regime are discussed. The finite-U mean field slave boson approach is used to study many-body effects. Magnetic field can rebuilt Kondo correlations, which are destroyed by the effect of spin-orbit interaction or valley mixing. Apart from the field induced revivals of SU(2) Kondo effects of different types: spin, valley or spin-valley, also more exotic phenomena appear, such as SU(3) Kondo effect. Threefold degeneracy occurs due to the effective intervalley exchange induced by short-range part of Coulomb interaction or due to the intershell mixing. In narrow gap nanotubes the full spin-orbital degeneracy might be recovered in the absence of magnetic field opening the condition for a formation of SU(4) Kondo resonance.

引用

页数：20

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