Erratum: Coherent effects in double-barrier ferromagnet/superconductor/ferromagnet junctions [Phys.
Erratum: Coherent effects in double-barrier ferromagnet/superconductor/ferromagnet junctions [Phys.
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DOI：
10.1103/physrevb.71.229901
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发表时间：
2002-10
影响因子：
3.7
通讯作者：
M. Božović;Z. Radovic
中科院分区：
文献类型：
--
作者：
M. Božović;Z. Radovic
研究了铁磁体/超导体/铁磁体（FSF）双势垒结中的相干量子传输。针对绝缘界面（从金属到隧道极限）、费米速度失配以及电极磁化的平行和反平行（AP）排列的一般情况，导出了电荷和自旋电导谱的解析表达式。我们关注有限尺寸和相干性的两个特征：亚能隙电子传输和微分电导的振荡。超导间隙上方几何共振能量的安德烈夫反射的周期性消失是准粒子干涉的一个显着结果。与非相干传输的情况相比，AP 排列发现了不平凡的自旋极化，而没有过多的自旋积累。
Coherent quantum transport in ferromagnet/superconductor/ferromagnet (FSF) double-barrier junctions is studied. Analytic expressions for charge and spin conductance spectra are derived for the general case of insulating interfaces (from metallic to tunnel limit), the Fermi velocity mismatch, and for parallel and antiparallel (AP) alignment of the electrode magnetizations. We focus on two characteristic features of finite size and coherency: subgap electronic transport and oscillations of the differential conductance. Periodic vanishing of the Andreev reflection at the energies of geometrical resonances above the superconducting gap is a striking consequence of the quasiparticle interference. In contrast with the case of incoherent transport, a nontrivial spin polarization without the excess spin accumulation is found for the AP alignment.