论文标题
由一维孤子诱导的镁鹅 - 汉宁效应
Magnonic Goos-Hanchen effect induced by one dimensional solitons
论文作者
论文摘要
镁光谱问题是根据一类通用磁性状态的可对角算子的光谱解决的，该磁性态包括几种类型的域壁和单轴helimagnets的手性孤子。专注于单轴helimagnets的孤立孤子，表明孤子散射（反射和透射）的旋转波遭受了类似于光学的鹅壁的侧向位移。位移是波长的一部分，但可以使用一系列分离良好的孤子来大大增强。与最近在某些磁系统中研究的鹅 - 汉湖效应相反，该磁系统发生在不同的磁系统之间的界面，此处预测的效果是在孤子位置发生的，从应用的角度来看，这很有趣，因为可以在不同的地方创建孤子并在材料上移动。这种鹅 - 汉宁效应并不是单轴helimagnets的特殊之处，但它是一类磁性状态的通用，包括界面dzyaloshinskii-moriya相互作用的系统中的域壁。
The magnon spectral problem is solved in terms of the spectrum of a diagonalizable operator for a generic class of magnetic states that includes several types of domain walls and the chiral solitons of monoaxial helimagnets. Focusing on the isolated solitons of monoaxial helimagnets, it is shown that the spin waves scattered (reflected and transmitted) by the soliton suffer a lateral displacement analogous to the Goos-Hanchen effect of optics. The displacement is a fraction of the wavelength, but can be greatly enhanced by using an array of well separated solitons. Contrarily to the Goos-Hanchen effect recently studied in some magnetic systems, which takes place at interfaces between different magnetic systems, the effect predicted here takes place at the soliton position, what it is interesting from the point of view of applications since solitons can be created at different places and moved across the material. This kind of Goos-Hanchen effect is not particular of monoaxial helimagnets, but it is generic of a class of magnetic states, including domain walls in systems with interfacial Dzyaloshinskii-Moriya interaction.
