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arXiv 1107.0819cond-mat.mes-hallcond-mat.supr-con
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自旋激活界面磁/超导结的散射理论

Scattering theory of magnetic/superconducting junctions with spin active interfaces

F. Romeo, R. Citro

摘要:

我们制定了一个广义的散射场论a la Buttiker描述粒子在磁性/超导异质结构中的输运。所提出的形式主义,其特征在于由四个组件的Bogoliubov de Gennes理论的旋量波函数,允许描述自旋翻转现象引起的非共线磁化的散射区域。作为理论的具体应用,我们分析了自旋阀系统中的电导、磁电阻和外加电压产生的自旋力矩。详细描述了电导和自旋矩中的量子尺寸效应和量子拍频模式。

英文摘要:

We formulate a generalized scattering field theory a la Buttiker describing particles transport in magnetic/superconducting heterostructures. The proposed formalism, characterized by a four- component spinorial wavefunction of the Bogoliubov de Gennes theory, allows to describe the spin flipping phenomena induced by noncollinear magnetizations in the scattering region. As a specific application of the theory, we analyze the conductance, the magnetoresistance and the generation of spin-torque produced by an applied voltage in a spin-valve system. Quantum size effects and quantum beating patterns both in the conductance and in the spin-torque are carefully described.

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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