A Theoretic Approach to SU(4) Kondo Effect in Carbon Nanotube Quantum Dots
ZHU Rui
Department of Physics, Tsinghua University, Beijing 100084
A Theoretic Approach to SU(4) Kondo Effect in Carbon Nanotube Quantum Dots
ZHU Rui
Department of Physics, Tsinghua University, Beijing 100084
关键词 ：
73.63.Kv ,
72.10.Fk ,
73.21.La
Abstract ： We propose a mean field approach to the transport properties of carbon nanotube quantum dots. Quantum interaction between spin and orbital pseudo-spin degrees of freedom results in an SU(4) Kondo effect at low temperatures. By calculating the chemical potentials and the tunnelling strengths, and hence the spectral functions for different coupling constants and applied magnetic fields, we find that this exotic Kondo effect manifests as a four-peak splitting in the non-linear conductance when an axial magnetic field is applied.
Key words ：
73.63.Kv
72.10.Fk
73.21.La
出版日期: 2006-06-01
:
73.63.Kv
(Quantum dots)
72.10.Fk
(Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect))
73.21.La
(Quantum dots)
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2006, Vol. 23 
