Phase coherence of the electron and hole in a ferromagnetic film in proximity with a superconductor

doi:10.1088/1674-1056/17/12/049

中国物理B ›› 2008, Vol. 17 ›› Issue (12): 4627-4634.doi: 10.1088/1674-1056/17/12/049

Phase coherence of the electron and hole in a ferromagnetic film in proximity with a superconductor

郁华玲, 王之国, 彭菊

Department of Physics, Huaiyin Teachers College, Huaian 223001, China

收稿日期:2007-10-25 修回日期:2008-07-06 出版日期:2008-12-20 发布日期:2008-12-20
基金资助:
Project supported by the Natural Science Foundation of Education Burean of Jiangsu Province, China (Grant No 07KJD140024), and Jiangsu key Laboratory for Chemistry of Low-Dimensional Materials (Huaiyin Teachers College), China.

Phase coherence of the electron and hole in a ferromagnetic film in proximity with a superconductor

Yu Hua-Ling (郁华玲), Wang Zhi-Guo (王之国), Peng Ju (彭菊)

Department of Physics, Huaiyin Teachers College, Huaian 223001, China

Received:2007-10-25 Revised:2008-07-06 Online:2008-12-20 Published:2008-12-20
Supported by:
Project supported by the Natural Science Foundation of Education Burean of Jiangsu Province, China (Grant No 07KJD140024), and Jiangsu key Laboratory for Chemistry of Low-Dimensional Materials (Huaiyin Teachers College), China.

摘要/Abstract

摘要： The scattering matrix approach between the clean and dirty limits is developed for the study of tunneling spectra in a ferromagnetic film in proximity to a superconductor. The minigap and the damped oscillation from ``0" to ``π" state in tunneling conductance are attributed to the phase coherence of the electrons and the corresponding Andreev-reflected holes in the ferromagnetic film. The calculated results provide a reasonable explanation for the behavior observed in recent experiments.

关键词: proximity effect, coherent transport, sequential transport

Abstract: The scattering matrix approach between the clean and dirty limits is developed for the study of tunneling spectra in a ferromagnetic film in proximity to a superconductor. The minigap and the damped oscillation from ``0" to ``$\pi$" state in tunneling conductance are attributed to the phase coherence of the electrons and the corresponding Andreev-reflected holes in the ferromagnetic film. The calculated results provide a reasonable explanation for the behavior observed in recent experiments.

Key words: proximity effect, coherent transport, sequential transport

中图分类号: (Proximity effects; Andreev reflection; SN and SNS junctions)

74.45.+c

73.40.Gk (Tunneling) 74.50.+r (Tunneling phenomena; Josephson effects)

郁华玲, 王之国, 彭菊. Phase coherence of the electron and hole in a ferromagnetic film in proximity with a superconductor[J]. 中国物理B, 2008, 17(12): 4627-4634.

Yu Hua-Ling (郁华玲), Wang Zhi-Guo (王之国), Peng Ju (彭菊). Phase coherence of the electron and hole in a ferromagnetic film in proximity with a superconductor[J]. Chin. Phys. B, 2008, 17(12): 4627-4634.

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Phase coherence of the electron and hole in a ferromagnetic film in proximity with a superconductor

Phase coherence of the electron and hole in a ferromagnetic film in proximity with a superconductor

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