s-波/铁磁/p-波超导结中的约瑟夫森电流:最低反常简谐项的贡献

doi:10.7523/j.issn.2095-6134.2016.03.009

中国科学院大学学报 ›› 2016, Vol. 33 ›› Issue (3): 339-346.DOI: 10.7523/j.issn.2095-6134.2016.03.009

s-波/铁磁/p-波超导结中的约瑟夫森电流:最低反常简谐项的贡献

鲍志勇, 金彪

中国科学院大学物理科学学院, 北京 100090

发布日期:2016-05-15
通讯作者: 金彪
基金资助:
Supported by Scientific Research fund of University of Chinese Aademy of Sciences(Y25102BN00)

Josephson current in s-wave superconductor/ ferromagnet/p-wave superconductor junctions: the lowest unusual harmonic contribution

BAO Zhiyong, JIN Biao

School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100090, China

Published:2016-05-15
Supported by:
Supported by Scientific Research fund of University of Chinese Aademy of Sciences(Y25102BN00)

摘要/Abstract

摘要：

用Matsubara格林函数方法研究s波超导/铁磁/p波超导结构的约瑟夫森效应.研究中考虑了p波超导中的3种配对形式.发现约瑟夫森电流的最低阶项是cosφ,讨论这个反常项(cosφ)随铁磁强度和铁磁宽度的变化.在这个系统中发现0-π转变,考虑了该系统在自旋电子学中的应用.

关键词: 约瑟夫森电流, p波超导, 低阶反常项

Abstract:

We study the Josephson effect in s-wave superconductor/ferromagnet/p-wave superconductor junctions using the Matsubara Green function method. Three p-wave pairing states with different orbital parts are considered. We focus on the lowest unusual harmonic contribution (∝cosφ) to Josephson current, where φ is a phase difference across the junction. We evaluate the dependence of this unusual term on the strength of magnetization and the width of the central ferromagnet layer. It is confirmed that the 0-π transition also occurs in s-wave superconductor/ferromagnet/p-wave junctions. A possible spintronic application of the present Josephson junction has been discussed.

Key words: Josephson current, p-wave superconductor, lowest unusual harmonic term

中图分类号:

O511

鲍志勇, 金彪. s-波/铁磁/p-波超导结中的约瑟夫森电流:最低反常简谐项的贡献[J]. 中国科学院大学学报, 2016, 33(3): 339-346.

BAO Zhiyong, JIN Biao . Josephson current in s-wave superconductor/ ferromagnet/p-wave superconductor junctions: the lowest unusual harmonic contribution[J]. , 2016, 33(3): 339-346.

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s-波/铁磁/p-波超导结中的约瑟夫森电流:最低反常简谐项的贡献

Josephson current in s-wave superconductor/ ferromagnet/p-wave superconductor junctions: the lowest unusual harmonic contribution

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