论文标题
自旋转移扭矩引起的NIO的超快抗铁磁开关
Ultrafast antiferromagnetic switching in NiO induced by spin transfer torques
论文作者
论文摘要
Nio是一种典型的抗铁磁铁，在THZ范围内具有特征性共振频率。从原子自旋动力学模拟中考虑了NIO的晶体学结构，尤其是符合其对称性的磁各向异性，我们通过自旋传输扭矩机制描述了以THZ频率的抗铁磁开关。在六个允许的稳定旋转方向之间切换次秒S-状态是为了合理可实现的旋转电流，就像激光诱导的超快脱氧化产生的旋转电流一样。描述了六态记忆的皮秒编写的一个简单过程，因此可以通过几个数量级来加快电子设备的当前逻辑的可能性。
NiO is a prototypical antiferromagnet with a characteristic resonance frequency in the THz range. From atomistic spin dynamics simulations that take into account the crystallographic structure of NiO, and in particular a magnetic anisotropy respecting its symmetry, we describe antiferromagnetic switching at THz frequency by a spin transfer torque mechanism. Sub-picosecond S-state switching between the six allowed stable spin directions is found for reasonably achievable spin currents, like those generated by laser induced ultrafast demagnetization. A simple procedure for picosecond writing of a six-state memory is described, thus opening the possibility to speed up current logic of electronic devices by several orders of magnitude.
