Proximity effects in normal mental/spin-splitting material/superconductor junctions

• 来源期刊: 中国物理（英文版）
• 关键词: proximity effects 'π'state Rashba spin-orbit coupling
• 年，卷（期）: 2007,（10）
• 页码范围: 3072-3079
• 页数: 8页
• 语种: 英文

摘要

We extend the Blonder, Tinkham and Klapwijk (BTK) theory to the study of the coexistence between ferromagnetism and s-wave superconductivity in ferromagnet/superconductor (F/S) structures. It is found that the ferromagnetism and s-wave superconductivity can coexist near the F/S interface, which is induced by proximity effects. On the F side, the density of states (DOS) exhibits some superconducting-like properties, and it displays a damped oscillation from '0' to 'π'states with increasing either the thickness of F film or the exchange energy. We also study the influences of the spin-polarized exchange splitting in the F and the spin-degeneracy by Rashba spin-orbit coupling (RSOC) in the two-dimensional electron gas (2DGE) on the proximity effects. It is shown that the case of Rashba spin-degeneracy is very different from that of the spin-polarized exchange splitting.