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

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

2010-03-04

arxiv.org/abs/1003.1045v1

Phys. Rev. B 81, 115327 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

48 pages, 45 figures

Scientific paper

10.1103/PhysRevB.81.115327

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.

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