Tunneling magnetoresistance in junctions composed of ferromagnets and time-reversal invariant topological superconductors

Tunneling magnetoresistance in junctions composed of ferromagnets and time-reversal invariant topological superconductors
复制标题

由铁磁体和时间反转不变拓扑超导体组成的结中的隧道磁阻

DOI:
10.1088/1367-2630/18/2/023031
复制
发表时间:
2015-10
影响因子:
3.3
通讯作者:
Wan, Shaolong
Wan, Shaolong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yan, Zhongbo;Wan, Shaolong

文献摘要

参考文献

相似文献

两个铁磁体之间的隧穿磁阻是自旋电子学中的一个重要问题。在这项工作中,我们表明隧道磁电阻也可以出现在铁磁体和时间反转不变拓扑超导体组成的结中,没有自旋旋转对称。这里的物理根源是,当铁磁体注入电子的自旋极化方向与马约拉纳零模的自旋极化方向处于同一平面时,电子会发生完美的自旋等安德烈夫反射,而其他自旋极化方向注入的电子会发生部分安德烈夫反射和部分法向反射,因此电导较低,从而产生磁阻效应。与传统的磁性隧道结相比,本文研究的结有一个前所未有的优点,即即使在铁磁体磁化强度较弱且绝缘隧道势垒没有特征的情况下,也可以获得任意高的隧道磁电阻。我们的发现为获得高隧穿磁阻提供了一种新的令人着迷的机制。
Tunneling magnetoresistance between two ferrromagnets is an issue of fundamental importance in spintronics. In this work, we show that tunneling magnetoresistance can also emerge in junctions composed of ferromagnets and time-reversal invariant topological superconductors without spin-rotation symmetry. Here the physical origin is that when the spin-polarization direction of an injected electron from the ferromagnet lies in the same plane of the spin-polarization direction of Majorana zero modes, the electron will undergo a perfect spin-equal Andreev reflection, while injected electrons with other spin-polarization directions will be partially Andreev reflected and partially normal reflected, which consequently has a lower conductance, and therefore, the magnetoresistance effect emerges. Compared to conventional magnetic tunnel junctions, an unprecedented advantage of the junctions studied here is that arbitrary high tunneling magnetoresistance can be obtained even when the magnetization of the ferromagnets are weak and the insulating tunneling barriers are featureless. Our findings provide a new fascinating mechanism to obtain high tunneling magnetoresistance.
DOI: 10.1126/science.1259327
发表时间: 2014-10-31
期刊: SCIENCE
影响因子: 56.9
作者:
Nadj-Perge, Stevan;Drozdov, Ilya K.;Yazdani, Ali
通讯作者: Yazdani, Ali
DOI: 10.1209/epl/i2000-00445-5
发表时间: 2000-11
期刊: EPL
影响因子: 1.8
作者:
S. Yuasa;T. Sato;E. Tamura;Yoshishige Suzuki;H. Yamamori;K. Ando;T. Katayama
通讯作者: S. Yuasa;T. Sato;E. Tamura;Yoshishige Suzuki;H. Yamamori;K. Ando;T. Katayama
DOI: 10.1088/1367-2630/16/9/093004
发表时间: 2014-02
影响因子: 3.3
作者:
Zhongbo Yan;S. Wan
通讯作者: Zhongbo Yan;S. Wan
DOI: 10.1209/0295-5075/111/47002
发表时间: 2014-11
期刊: Europhysics Letters
影响因子: --
作者:
Zhongbo Yan;S. Wan
通讯作者: Zhongbo Yan;S. Wan
DOI: 10.1103/physrevb.81.125318
发表时间: 2010-03-01
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
Alicea, Jason
通讯作者: Alicea, Jason