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Conductance oscillations due to geometrical resonance in FNS double junctions

机译:FNS双结中由于几何共振引起的电导振荡

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摘要

We theoretically analyzed the Andreev reflection in ferromagnetic metalonmagnetic metal/superconductor double junctions with special attention to the electron interference effect in the nonmagnetic metal layer. We showed that the conductance oscillates as a function of the bias voltage due to the geometrical resonance. We found that the exchange field, and therefore the spin polarization of the ferromagnetic metal can be determined from the period of the conductance oscillation, which is proportional to the square root of the exchange field.
机译:我们从理论上分析了铁磁性金属/非磁性金属/超导体双结中的安德列夫反射,并特别注意了非磁性金属层中的电子干扰效应。我们表明,由于几何共振,电导随偏置电压的变化而振荡。我们发现,交换磁场以及铁磁性金属的自旋极化可以从电导振荡的周期确定,该周期与交换场的平方根成比例。

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