Spin-triplet pairing states in ferromagnet/ferromagnet/d-wave superconductor heterojunctions with noncollinear magnetizations.
Spin-triplet pairing states in ferromagnet/ferromagnet/d-wave superconductor heterojunctions with noncollinear magnetizations.
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DOI：
10.1103/physrevlett.98.057005
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发表时间：
2007-02
影响因子：
8.6
通讯作者：
Z. Niu;D. Xing
中科院分区：
文献类型：
--
作者：
Z. Niu;D. Xing
利用四分量Bogoliubov-de Gennes方程研究了清洁铁磁/铁磁/d波超导体（F/F/d波S）双隧道结的隧道电导。这种新颖的Andreev反射是由于非共线磁化引起的，入射电子和Andreev反射空穴来自同一自旋子带，在F/S界面附近产生自旋-三重态配对。在高度极化Fs的情况下，能隙内的电导表现出从平行磁化中的零偏谷到垂直磁化中的分裂零偏峰的转换。
Tunneling conductance in clean ferromagnet/ ferromagnet/d-wave superconductor (F/F/d-wave S) double tunnel junctions is studied by use of four-component Bogoliubov-de Gennes equations. The novel Andreev reflection appears due to noncollinear magnetizations, in which the incident electron and the Andreev-reflected hole come from the same spin subband, resulting in spin-triplet pairing states near the F/S interface. In the highly polarized Fs case, the conductance within the energy gap exhibits a conversion from a zero-bias dip in the parallel magnetizations to a spilt zero-bias peak in the perpendicular magnetizations.