Spontaneous Josephson spin current in triplet superconductor/ferromagnet/triplet superconductor junctions

doi:10.1088/1674-1056/19/6/067301

中国物理B ›› 2010, Vol. 19 ›› Issue (6): 67301-067301.doi: 10.1088/1674-1056/19/6/067301

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Spontaneous Josephson spin current in triplet superconductor/ferromagnet/triplet superconductor junctions

徐茂杰, 窦晓鸣

Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China

收稿日期:2009-09-16 出版日期:2010-06-15 发布日期:2010-06-15

Spontaneous Josephson spin current in triplet superconductor/ferromagnet/triplet superconductor junctions

Xu Mao-Jie(徐茂杰) and Dou Xiao-Ming(窦晓鸣)

Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2009-09-16 Online:2010-06-15 Published:2010-06-15

摘要/Abstract

摘要： This paper theoretically studies Josephson spin current through triplet superconductor/ferromagnet/triplet superconductor junctions. At the ferromagnet/superconductor interfaces, the ferromagnetic scattering potential gives rise to coupling between the Andreev bound states and lifts their spin degeneracy. These spin-split Andreev states carry the Josephson spin current through the junctions. The generated spin supercurrent can be controlled by the magnetization of a ferromagnetic thin layer and bias voltage across the junctions.

Abstract: This paper theoretically studies Josephson spin current through triplet superconductor/ferromagnet/triplet superconductor junctions. At the ferromagnet/superconductor interfaces, the ferromagnetic scattering potential gives rise to coupling between the Andreev bound states and lifts their spin degeneracy. These spin-split Andreev states carry the Josephson spin current through the junctions. The generated spin supercurrent can be controlled by the magnetization of a ferromagnetic thin layer and bias voltage across the junctions.

Key words: triplet superconductor, Andreev states, Josephson spin current

中图分类号: (Tunneling phenomena; Josephson effects)

74.50.+r

74.45.+c (Proximity effects; Andreev reflection; SN and SNS junctions) 74.25.Ha (Magnetic properties including vortex structures and related phenomena) 75.70.Ak (Magnetic properties of monolayers and thin films) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)

徐茂杰, 窦晓鸣. Spontaneous Josephson spin current in triplet superconductor/ferromagnet/triplet superconductor junctions[J]. 中国物理B, 2010, 19(6): 67301-067301.

Xu Mao-Jie(徐茂杰) and Dou Xiao-Ming(窦晓鸣). Spontaneous Josephson spin current in triplet superconductor/ferromagnet/triplet superconductor junctions[J]. Chin. Phys. B, 2010, 19(6): 67301-067301.

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Spontaneous Josephson spin current in triplet superconductor/ferromagnet/triplet superconductor junctions

Spontaneous Josephson spin current in triplet superconductor/ferromagnet/triplet superconductor junctions

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