Spin polarized current and shot noise in carbon nanotube quantum dot in the Kondo regime

Abstract

Using nonequilibrium Green functions and several complementary many-body approximations we calculate shot noise and spin dependent conductance in carbon nanotube semiconducting quantum dot in spin-orbital Kondo regime. We point out on the possibility of reaching giant values of tunnel magnetoresistance in this range and discuss a prospect of its gate control. We also analyze the influence of symmetry breaking perturbations on the shot noise with special emphasis on spin dependent effects. The gate and bias dependencies of noise Fano factors influenced by magnetic field, polarization of electrodes and spin-flip processes are presented.

arXiv comment48 pages, 45 figures

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• Spin-orbital and spin Kondo effects in parallel coupled quantum dots
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• Two-stage three-channel Kondo physics for an FePc molecule on the Au(111) surface
• Kondo behavior and conductance through $3d$ impurities in gold chains doped with oxygen
• Intra- and inter-shell Kondo effects in carbon nanotube quantum dots
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• Kondo effect near the Van Hove singularity in biased bilayer graphene
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• Impact of electron-phonon coupling on electron transport through T-shaped arrangements of quantum dots in the Kondo regime
• Gate control of spin-polarized conductance in alloyed transition metal nano-contacts
• Fractional shot noise of an SU(N) Kondo system