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.

48 pages, 45 figures

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Cited by in corpus (6)

• Graphene nanoflakes in external electric and magnetic in-plane fields
• Thermopower of an SU(4) Kondo resonance under an SU(2) symmetry-breaking field
• The Kondo crossover in shot noise of a single quantum dot with orbital degeneracy
• Kondo behavior and conductance through $3d$ impurities in gold chains doped with oxygen
• Two-orbital Kondo effect in quantum dot coupled to ferromagnetic leads
• Gate control of spin-polarized conductance in alloyed transition metal nano-contacts