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 ‘v＇ 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.
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 ‘v＇ 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.
基金
Project supported by the Natural Science Foundation of Education Bureau of Jiangsu Province, China （Grant No 05KJB140008）, and the Program for Excellent Talents in Huaiyin Teachers College, China.Acknowledgment We are especially grateful to Professor D. Y. Xing for pointing out the problem in this paper.
