SPIN-POLARIZED QUASIPARTICLE TRANSPORT IN FERROMAGNET-D-WAVE-SUPERCONDUCTOR JUNCTIONS WITH A 110 INTERFACE
SPIN-POLARIZED QUASIPARTICLE TRANSPORT IN FERROMAGNET-D-WAVE-SUPERCONDUCTOR JUNCTIONS WITH A 110 INTERFACE
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DOI：
10.1103/physrevb.59.9558
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发表时间：
1999-04
影响因子：
3.7
通讯作者：
Jian-Xin Zhu;B. Friedman;C. Ting
中科院分区：
文献类型：
--
作者：
Jian-Xin Zhu;B. Friedman;C. Ting
在散射框架下，对具有${110}$界面的铁磁d波超导结中自旋极化准粒子输运进行了理论研究。我们发现，由于铁磁体中的交换场对Andreev反射的修正，亚带电导行为与超导体的情况有质的不同，并且由于d波序参量沿着晶体的${110}$方向的符号变化，亚带电导行为也可以与铁磁体\char 21 {}$s$波结的行为有显著的不同.对于弹道铁磁\char 21 {}$d$波超导结，零偏置电导最小。此外，在有限偏压下的电导最大值也可以通过界面散射来演化。对于一个正常的金属\char 21 {}铁磁\char 21 {}$d$波超导结，电导共振的预测。
Within a scattering framework, a theoretical study is presented for the spin-polarized quasiparticle transport in ferromagnet\char21{}$d$-wave-superconductor junctions with ${110}$ interface. We find that the subgap conductance behaviors are qualitatively different from a nonmagnetic case, due to the modification of Andreev reflection by the exchange field in the ferromagnet, and can also be significantly different from those of a ferromagnet\char21{}$s$-wave junction because of the sign change of the d-wave order parameter along the ${110}$ direction of the crystal. For a ballistic ferromagnet\char21{}$d$-wave-superconductor junction, a zero-bias conductance minimum is achieved. In addition, a conductance maximum at finite bias can also be evolved by interfacial scattering. For a normal-metal\char21{}ferromagnet\char21{}$d$-wave-superconductor junction, conductance resonances are predicted.