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中国物理学会期刊

铁磁-绝缘层-d波超导结中的Andreev反射特性

CSTR: 32037.14.aps.49.2276

THE PROPERTIES OF THE ANDREEV REFLECTION IN FERROMAGNET-INSULATOR-d WAVE SUPERCONDUCTOR JUNCTION

CSTR: 32037.14.aps.49.2276
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  • 考虑到铁磁层中的磁交换作用和界面散射效应,利用推广的Blonder-Tinkham-Klapwijk散射理论,计算铁磁-绝缘层-d波超导结中的准粒子输运系数与隧道谱.研究表明:铁磁层中的交换场能抑制Andreev反射,使得依赖于准粒子入射角的Andreev反射表现出瞬息波的行为,呈现一些新的隧道谱特征.

     

    Taking into account the exchange interaction in the ferromagnet and the interface scattering effect, within Blonder-Tinkham-Klapwijk scattering formalism, we have calculated the quasiparticle transport coefficients and the tunneling spectrum in the ferromagnet-insulator-d wave superconductor junction. It is found that the ferromagnetic exchange interaction can suppress the Andreev reflection, and consequently the Andreev reflected quasiparticle shows an evanescent-wave behavior depending on the injection angle of the quasiparticle. The tunneling spectrum exhibits some novel features.

     

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