Twisted Magnon as a Magnetic Tweezer

Jiang, Yuanyuan; Yuan, H. Y.; Li, Z.-X.; Wang, Zhenyu; Zhang, H. W.; Cao, Yunshan; Peng, Yan

doi:10.1103/physrevlett.124.217204

Cited by 58 publications

(24 citation statements)

References 59 publications

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“…Remarkably, the spintronic devices based on magnetic solitons have a lot of advantages over their electronic counterpart. For example, the nanooscillators based on magnetic vortices or skyrmions are very robust and flexible [214][215][216]; By using the skyrmion as the carrier of information, the data storage density can be greatly improved, and the current density required for encoding information can be significantly reduced [211,213,[275][276][277][278]; It is very convenient to realize various logic operations by using skyrmion [279][280][281][282][283]; There are many ways to manipulate magnetic solitons [284][285][286][287][288][289], which makes the spintronic devices reconfigurable and tunable. In this section, we focus on the collective dynamics and the topological insulator state in artificial magnetic-soliton lattice.…”

Section: Topological Solitonic Insulatorsmentioning

confidence: 99%

Topological insulators and semimetals in classical magnetic systems

Li,

Cao,

Yan

2020

Preprint

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Pursuing topological phases in natural and artificial materials is one of the central topics in modern physical science and engineering. In classical magnetic systems, spin waves (or magnons) and magnetic solitons (such as domain wall, vortex, skyrmion, etc) represent two important excitations. Recently, the topological insulator and semimetal states in magnon-and soliton-based crystals (or metamaterials) have attracted growing attention owing to their interesting dynamics and promising applications for designing robust spintronic devices. Here, we give an overview of current progress of topological phases in structured classical magnetism. We first provide a brief introduction to spin wave, and discuss its topological properties including magnon Hall effects, topological magnon insulators, and Dirac (Weyl) magnon semimetals. Appealing proposal of topological magnonic devices is also highlighted. We then review the collective-coordinate approach for describing the dynamics of magnetic soliton lattice. Pedagogical topological models such as the Su-Schrieffer-Heeger model and the Haldane model and their manifestation in magnetic soliton crystals are elaborated. Then we focus on the topological properties of magnetic solitons, by theoretically analyzing the first-order topological insulating phases in low dimensional systems and higher-order topological states in breathing crystals. Finally, we discuss the experimental realization and detection of the edge states in both the magnonic and solitonic crystals. We remark the challenges and future prospects before concluding this article.

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Section: Topological Solitonic Insulatorsmentioning

confidence: 99%

Topological insulators and semimetals in classical magnetic systems

Li,

Cao,

Yan

2020

Preprint

Self Cite

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“…Effective controls of skyrmions have been demonstrated using various external stimuli including electric current [13,14], gradient magnetic field [15], oscillating and gradient electric field [16,17], and polarized magnon [18][19][20][21][22][23]. Among these stimuli, magnons as the quanta of spin waves, driving skyrmion motion without Joule heating due to the absence of charge physical transport, are particularly attractive for the advantage of low-energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Magnon-driven skyrmion dynamics in antiferromagnets: Effect of magnon polarization

et al. 2021

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The controllable magnetic skyrmion motion represents a highly concerned issue in preparing advanced skyrmion-based spintronic devices. Specifically, magnon-driven skyrmion motion can be easily accessible in both metallic and insulating magnets, and thus is highly preferred over electric current control further for the ultra-low energy consumption. In this work, we investigate extensively the dynamics of skyrmion motion driven by magnon in an antiferromagnet using the collective coordinate theory, focusing on the effect of magnon polarization. It is revealed that the skyrmion Hall motion driven by circularly polarized magnon becomes inevitable generally, consistent with earlier report. Furthermore, the elastic scattering theory and numerical results unveil the strong inter-dependence between the linearly polarized magnon and skyrmion motion, suggesting the complicated dependence of the skyrmion motion on the polarization nature of driving magnon. On the reversal, the scattering from the moving skyrmion may lead to decomposition of the linearly polarized magnon into two elliptically polarized magnon bands. Consequently, a net transverse force acting on skyrmion is generated owing to the broken mirror symmetry, which in turn drives a skyrmion Hall motion. The Hall motion can be completely suppressed only in some specific condition where the mirror symmetry is preserved. The present work unveils non-trivial skyrmion-magnon scattering behavior in antiferromagnets, advancing the antiferromagnetic spintronics and benefiting to high-performance devices.

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“…The interaction between skyrmions and magnons has been widely studied in magnon-skyrmion scattering [12,13], magnon-driven skyrmion motion [14,15], skyrmionbased magnonic crystal [16,17], and skyrmion-induced magnon frequency comb [18]. Recently, the conversion between skyrmions and magnons has been attracting much attention.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Skyrmion Generation by Reflective Spin Wave Focusing

et al. 2021

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We propose a method to generate magnetic skyrmions by focusing spin waves totally reflected by a curved film edge. The edge contour is derived to be parabolic and frequency-independent based on the identical magnonic path length principle. We performed micromagnetic simulations to verify our theoretical design. Under proper conditions, the reflected spin waves first converge at the focal point with the enhanced intensity leading to the emergence of magnetic droplets, which are then converted to magnetic skyrmion accompanied by a change in the topological charge. We numerically obtain the phase diagram of skyrmion generation with respect to the amplitude and frequency of the driving field. Our finding would be helpful for the design of spintronic devices combining the advantage of skyrmionics and magnonics.

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Twisted Magnon as a Magnetic Tweezer

Cited by 58 publications

References 59 publications

Topological insulators and semimetals in classical magnetic systems

Topological insulators and semimetals in classical magnetic systems

Magnon-driven skyrmion dynamics in antiferromagnets: Effect of magnon polarization

Magnetic Skyrmion Generation by Reflective Spin Wave Focusing

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