Institut für Theoretische Physik, Technische Universität Dresden, Dresden, Germany.
J Phys Condens Matter. 2012 Feb 1;24(4):045701. doi: 10.1088/0953-8984/24/4/045701. Epub 2012 Jan 3.
Charge and spin transport in a junction involving two triplet superconductors and a ferromagnetic barrier are studied. We use Bogoliubov-de Gennes wavefunctions to construct the Green's function, from which we obtain the Josephson currents in terms of the Andreev reflection coefficients. We focus on the consequences of a finite barrier width for the occurrence of 0-π transitions and for the spin currents, and examine the appropriateness of the common δ-function approximation for the tunneling region.
研究了涉及两个三重超导体和一个铁磁势垒的结中的电荷和自旋输运。我们使用 Bogoliubov-de Gennes 波函数来构建格林函数，从中我们根据安德烈夫反射系数得到约瑟夫森电流。我们关注有限势垒宽度对 0-π 跃迁和自旋电流发生的影响，并检查隧道区域中常见的 δ 函数近似的适当性。
