Josephson effect through magnetic skyrmions
Josephson effect through magnetic skyrmions
复制标题
通过磁斯格明子产生的约瑟夫森效应
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
J. Linder
中科院分区：
文献类型：
--
作者：
T. Yokoyama;J. Linder
我们发现与磁skyrmion相关的多个自由度-大小、位置和螺旋度-都可以用来控制超导体/磁skyrmion/超导体结中发生的约瑟夫森效应和跃迁。在存在两个Skyrmion的情况下，约瑟夫森效应强烈地依赖于它们的相对螺旋度，并导致超导的螺旋度晶体管效应的可能性，其中临界电流仅通过反转磁性Skyrmion的螺旋度而改变几个数量级。此外，我们证明了夫琅和费图案可以显示一个局部最小值在零通量作为一个直接结果的skyrmion磁织构。这些发现展示了将拓扑磁性物体与超导体相结合时出现的丰富物理学，并可能导致超导自旋电子学的不同观点。
We discover that the multiple degrees of freedom associated with magnetic skyrmions---size, position, and helicity---can all be used to control the Josephson effect and $0ensuremath{-}ensuremath{pi}$ transitions occurring in superconductor/magnetic skyrmion/superconductor junctions. In the presence of two skyrmions, the Josephson effect depends strongly on their relative helicity and leads to the possibility of a helicity-transistor effect for the supercurrent, where the critical current is changed by several orders of magnitude simply by reversing the helicity of a magnetic skyrmion. Moreover, we demonstrate that the Fraunhofer pattern can show a local minimum at zero flux as a direct result of the skyrmion magnetic texture. These findings demonstrate the rich physics that emerges when combining topological magnetic objects with superconductors and could lead to different perspectives in superconducting spintronics.