FNS双结几何谐振引起的电导振荡
Conductance oscillation due to the geometrical resonance in FNS double junctions
摘要:
本文从理论上分析了铁磁金属/超导金属/超导体双结中的Andreev反射,特别考虑了超导金属层中的电子干涉效应。我们表明,由于几何谐振的电导振荡作为偏置电压的函数。我们发现,交换场,因此自旋极化的铁磁金属可以确定从电导振荡的周期,这是成比例的平方根的交换场。
英文摘要:
We theoretically analyzed the Andreev reflection in ferromagnetic metal/nonmagnetic 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.
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