论文标题
3D拓扑绝缘子的S/F/S Josephson连接器中的磁化逆转
Magnetization reversal in S/F/S Josephson junctions on a 3D topological insulator
论文作者
论文摘要
我们研究了超导体/绝缘铁磁体/超导体的磁电流脉冲的磁性逆转，位于3D拓扑绝缘子的顶部。事实证明，由于Ti表面状态下强烈的自旋旋转锁定，因此这种系统是低脉冲旋转基质的视角。该特性在轨道和自旋的自由度之间提供了理想的强耦合，从而通过电流脉冲有效地逆转磁矩，幅度低于临界电流，从而导致能量耗散大大降低。讨论了逆转的基本物理机制。研究了磁各向异性对脉冲持续时间逆转的可控性的影响。另外，提出了同时进行逆转电气检测的方式。
We study a magnetization reversal by an electric current pulse in a superconductor/insulating ferromagnet/superconductor Josephson junction placed on top of a 3D topological insulator. It is demonstrated that such a system is perspective for low-dissipative spintronics because of the strong spin-momentum locking in the TI surface states. This property provides an ideally strong coupling between the orbital and spin degrees of freedom thus giving a possibility of efficient reversal of the magnetic moment by current pulse with amplitude lower than the critical current, that results in strongly reduced energy dissipation. The underlying physical mechanism of the reversal is discussed. The influence of the magnetic anisotropy on the controllability of the reversal by the pulse duration is investigated. In addition, a way of a simultaneous electrical detection of the reversal is proposed.
