Energy Transfer between Coupled Planar Magnon Waveguides Near an Exceptional Point

IF 1.4 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY
O. S. Temnaya, S. A. Nikitov
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引用次数: 0

Abstract

Energy transfer is investigated in coupled planar magnon “ferromagnet–normal metal” heterostructures with equivalent amplification and damping of spin waves, in which an exceptional point (point in the space of the parameters of a system where its eigenvalues and eigenvectors degenerate) can be observed. It is shown that an increase in the direct current of different polarities (causing a change in the spin-polarized current) leads to an increase in the length of energy transfer from one heterostructure to another, which tends to infinity at the exceptional point. The mismatch in the natural magnetization damping constants of the two waveguides reduces the critical current at which the exceptional point arises, whereas the mismatch in the wavenumbers (the absence of phase-velocity synchronism) increases the critical current at a bounded energy transfer length. The results presented can be used to design controlled magnon directional interconnects.

Abstract Image

Abstract Image

异常点附近耦合平面磁子波导之间的能量传递
研究了具有等效自旋波放大和阻尼的耦合平面磁子 "铁磁体-普通金属 "异质结构中的能量传递,其中可以观察到一个特殊点(系统参数空间中其特征值和特征向量退化的点)。研究表明,不同极性的直流电的增加(导致自旋极化电流的变化)会导致从一个异质结构到另一个异质结构的能量转移长度的增加,而能量转移长度在异常点处趋于无穷大。两个波导的自然磁化阻尼常数不匹配会降低出现异常点的临界电流,而波数不匹配(没有相位速度同步性)则会增加有界能量转移长度的临界电流。这些结果可用于设计受控磁子定向互连。
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来源期刊
JETP Letters
JETP Letters 物理-物理:综合
CiteScore
2.40
自引率
30.80%
发文量
164
审稿时长
3-6 weeks
期刊介绍: All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.
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