| 铁磁绝缘层对正常金属/铁磁绝缘层/正常金属/p波超导结隧道谱的影响 |
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| 引用本文： | 李红,杨新建,凌翠翠.铁磁绝缘层对正常金属/铁磁绝缘层/正常金属/p波超导结隧道谱的影响[J].低温物理学报,2009(3). |
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| 作者姓名： | 李红 杨新建 凌翠翠 |
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| 作者单位： | 中国石油大学物理科学与技术学院; |
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| 基金项目： | 中国石油大学基金(项目编号:Y071807)资助的课题~~ |
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| 摘 要： | 在正常金属/铁磁绝缘层/正常金属/自旋三重态p波超导隧道结中,考虑到铁磁绝缘层的磁散射和粗糙界面散射,运用Bogoliubov-de Gennes(BdG)方程和Blonder-Tinkham-Klapwijk(BTK)理论模型,研究了铁磁绝缘层对隧道结微分电导的影响.研究表明:(1)对于px波,粗糙界面散射和磁散射都能使零偏压电导峰变低,能隙处凹陷升高;随着磁散射的增强,谱线的尖锐峰消失,宽峰逐渐变为凹陷;(2)对于py波,粗糙界面散射和磁散射都能使零能凹陷上移,能隙峰变低,随着粗糙界面散射的增强,两能隙峰间距减小;随着中间正常金属层厚度的增加,能隙内电导随外加偏压呈现振荡行为,能隙外电导仅与普通势垒有关;(3)对于px+ipy波,随着粗糙界面散射的增强,零偏压电导峰被压低,双凹陷处的值逐渐增大为小的能隙峰,而磁散射并不改变谱线中各凹陷处的电导值.
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| 关 键 词： | 自旋三重态p波超导体 隧道谱 磁散射 粗糙界面散射 |
EFFECT OF THE FERROMAGNETIC INSULATOR ON THE TUNNEL SPECTRUM IN NORMAL METAL/FERROMAGNETIC INSULATOR/NORMAL METAL/p-WAVE SUPERCONDUCTOR JUNCTIONS |
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| LI Hong YANG Xin-jian LING Cui-cui College of Physical Science , Technology,China University of Petroleum,Sh,ong Dongying.EFFECT OF THE FERROMAGNETIC INSULATOR ON THE TUNNEL SPECTRUM IN NORMAL METAL/FERROMAGNETIC INSULATOR/NORMAL METAL/p-WAVE SUPERCONDUCTOR JUNCTIONS[J].Chinese Journal of Low Temperature Physics,2009(3). |
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| Authors: | LI Hong YANG Xin-jian LING Cui-cui College of Physical Science Technology China University of Petroleum Sh ong Dongying |
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| Institution: | LI Hong YANG Xin-jian LING Cui-cui College of Physical Science , Technology,China University of Petroleum,Sh,ong Dongying,257061 |
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| Abstract: | Using Blonder-Tinkham-Klapwijk (BTK) approach and Bogoliubov-de Gennes (BdG) equation,we have studied,taking into account the magnetic scattering and rough interface scattering,the effect of the ferromagnetic insulator on the conductance in normal metal/ferromagnetic insulator/normal metal/p-wave superconductor (N/FI/Np) junctions. It is found that: (1) For the px-wave,the cough interface scattering and the magnetic scattering effect can suppress the zero-bias conductance peak (ZBCP) as well as raise the en... |
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| Keywords: | triplet p-wave superconductor tunnel spectrum magnetic scattering rough interface scattering |
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