Topological computation based on direct magnetic logic communication.
Topological computation based on direct magnetic logic communication.
复制标题
DOI：
10.1038/srep15773
复制
发表时间：
2015-10-28
影响因子：
4.6
通讯作者：
Hesjedal T
中科院分区：
文献类型：
--
作者：
Zhang S;Baker AA;Komineas S;Hesjedal T
具有非平凡拓扑结构的非均匀磁畴，如涡旋和skyrmions，被认为是非易失性信息存储的上级状态变量。到目前为止，还没有考虑使用拓扑对象进行逻辑运算的可能性。在这里，我们证明了数值系统的拓扑结构起着重要的作用，其动力学，使用的例子中的平面铁磁膜的涡旋-antivortex对。利用动态特性和几何约束，实现了拓扑存储器载体之间的直接逻辑通信。这样，不需要额外的磁-电转换。更重要的是，信息载体可以自发地传播到~300 nm，不需要自旋极化电流。导出的逻辑方案使拓扑自旋电子学，它可以集成到大规模的存储器和逻辑网络能够进行复杂的计算。
Non-uniform magnetic domains with non-trivial topology, such as vortices and skyrmions, are proposed as superior state variables for nonvolatile information storage. So far, the possibility of logic operations using topological objects has not been considered. Here, we demonstrate numerically that the topology of the system plays a significant role for its dynamics, using the example of vortex-antivortex pairs in a planar ferromagnetic film. Utilising the dynamical properties and geometrical confinement, direct logic communication between the topological memory carriers is realised. This way, no additional magnetic-to-electrical conversion is required. More importantly, the information carriers can spontaneously travel up to ~300 nm, for which no spin-polarised current is required. The derived logic scheme enables topological spintronics, which can be integrated into large-scale memory and logic networks capable of complex computations.