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arXiv 1003.1045cond-mat.mes-hall
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近藤机制下碳纳米管量子点中的自旋极化电流和散粒噪声

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

Stanislaw Lipinski, Damian Krychowski

摘要:

利用非平衡格林函数和几种互补多体近似,计算了自旋轨道近藤机制下碳纳米管半导体量子点的散粒噪声和自旋相关电导.指出了在此范围内实现隧道磁电阻巨值的可能性,并讨论了其栅极控制的前景。我们还分析了对称破缺微扰对散粒噪声的影响,特别强调了自旋相关效应。给出了噪声Fano因子受磁场、电极极化和自旋反转过程影响的栅和偏置依赖关系。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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