论文标题
在一维镁晶体中的子宫传播缺陷上的自旋波动定位
Spin-wave localization on phasonic defects in one-dimensional magnonic quasicrystal
论文作者
论文摘要
我们报告了在结构障碍下有意地引入一维镁准晶体下的自旋波谱的演变。从理论上讲，我们研究了由斐波那契序列排列的铁磁条组成的系统。我们考虑了子宫缺陷形式的几个疾病阶段，其中引入了不同的条带。通过从准碘秩序向疾病的过渡，我们显示了自旋波分形光谱的逐渐降解和频率间隙的闭合。尤其是，子宫缺陷通过将模式移动到频率间隙并在频率间隙内显示新模式，从而导致van霍夫奇异性在频率间隙边缘消失。这些模式分散并最终可以随着障碍水平的增加而缩小差距。这项工作揭示了疾病的存在如何修饰未经推出的镁准晶体中存在的固有的自旋波段定位。该论文有助于了解镁纤维曲霉准晶体的知识，并为研究二维宏伟的准晶体中的子宫次缺陷开辟了道路。
We report on the evolution of the spin-wave spectrum under structural disorder introduced intentionally into one-dimensional magnonic quasicrystal. We study theoretically a system composed of ferromagnetic strips arranged in a Fibonacci sequence. We considered several stages of disorder in the form of phasonic defects, where different rearrangements of strips are introduced. By transition from the quasiperiodic order towards disorder, we show a gradual degradation of spin-waves fractal spectra and closing of the frequency gaps. In particular, the phasonic defects lead to the disappearance of the van Hove singularities at the frequency gap edges by moving modes into the frequency gaps and appearing new modes inside the frequency gaps. These modes disperse and eventually can close the gap, with increasing disorder levels. The work reveals how the the presence of disorder modifies the intrinsic spin wave localization existing in undefected magnonic quasicrystals. The paper contributes to the knowledge of magnonic Fibonacci quasicrystals and opens the way to study of the phasonic defects in two-dimensional magnonic quasicrystals.
