Zheng Zhi Ming, Xing D Y
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China.
J Phys Condens Matter. 2009 Sep 23;21(38):385703. doi: 10.1088/0953-8984/21/38/385703. Epub 2009 Aug 27.
Taking into account spin-flip scattering at superconductor/half-metallic ferromagnet (S/F) interfaces in S/F/S Josephson junctions, we extend the Blonder-Tinkham-Klapwijk approach and novel Andreev reflection idea to studying the Josephson current and spatially dependent superconducting order parameters for singlet and triplet pairing states. It is found that the novel Andreev reflection at the F/S interfaces can result in electron-hole correlations in one spin subband of the F and a large supercurrent of spin-equal pairing through a long half-metallic link.
考虑到S/F/S约瑟夫森结中，超导体/半金属铁磁体（S/F）界面处的自旋翻转散射，我们将布隆德-廷克汉姆-克拉普维克方法和新颖的安德列夫反射思想进行扩展，以研究单重态和三重态配对态的约瑟夫森电流及空间相关的超导序参量。研究发现，F/S界面处的新颖安德列夫反射可导致F的一个自旋子带中的电子-空穴关联，并通过长半金属链产生自旋相等配对的大超电流。
