Chiral logic computing with twisted antiferromagnetic magnon modes

Jia, Chenglong; Chen, Min; Schäffer, Alexander F.; Berakdar, J.

doi:10.1038/s41524-021-00570-0

Cited by 27 publications

(8 citation statements)

References 53 publications

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“…The chirality of magnons is a novel degree of freedom in spintronics, with respect to charge and spin degrees of freedom of an electron. In particular, the linear combinations of right-handed and left-handed chiralities may produce rich possible states of high-dimensionality 8 (i.e., magnonic isospin) which would facilitate the chirality-based computing 8,10 , field-effect transistor 11 , logic devices 12 , etc. Meanwhile, the magnon chirality is a more robust degree of freedom in contrast to the amplitude and phase.…”

mentioning

confidence: 99%

Switching magnon chirality in artificial ferrimagnet

Liu

et al. 2022

Nat Commun

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Chirality, an intrinsic degree of freedom, has been barely exploited as the information carriers in data transmission, processing, computing, etc. Recently the magnons in antiferromagnets were proposed to carry both right-handed and left-handed chiralities, shedding a light on chirality-based spintronics in which chirality-based computing architectures and chiral magnonic devices may become feasible. However, the practical platform for chirality-based spintronics remains absent yet. Here we report an artificial ferrimagnetic Py/Gd/Py/Gd/Py/Pt multilayer by which the switching, reading, and modulation of magnon chirality are demonstrated. In particular, the coexisting resonance modes of ferromagnetic and antiferromagnetic characteristics permit the high adjustability and easy control of magnon chirality. As a main result, we unambiguously demonstrated that Py precessions with opposite chiralities pump spin currents of opposite spin polarizations into the Pt layer. Our result manifests the chirality as an independent degree of freedom and illustrates a practical magnonic platform for exploiting chirality, paving the way for chirality-based spintronics.

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mentioning

confidence: 99%

Switching magnon chirality in artificial ferrimagnet

Liu

et al. 2022

Nat Commun

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“…除了常见的自旋角动量(spin angular momentum, SAM), 最近研究发现在具有旋转对称性的磁体系中(如纳米圆柱、圆盘等)自旋波还可以携带轨道角动量(orbit angular momentum, OAM) [159,160] ,…”

Section: ±1unclassified

“…(a) Schematic of nonlinear magnon-skyrmion scattering induced spin-wave frequency comb; (b) micromagnetic simulation results [35] . [42,159,160] , 偶极相互作用诱导的三磁子耦合强度较弱, 无法产生磁子频率梳. 早期研究结果表明, 不均匀磁结构可以诱导和增强三磁子的耦合强度 [31,32,145] , 有望实现磁子频率梳的产生.…”

Section: ±1unclassified

Topological states and quantum effects in magnonics

Wang¹,

Li²,

Huai-Yang³

et al. 2023

Acta Phys. Sin.

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In recent years, with the rapid development of the emerging technologies including the Internet of Things, cloud computing, big data, artificial intelligence and 5G, higher computing power is required. Traditional semiconductor devices are confronting the huge challenges brought by device miniaturization, energy consumption, heat dissipation, and so on. Moore.s law which succeeds in guiding downscaling and upgrading of microelectronics is nearing its end. A new information carrier is urgent need for information transmission and processing instead of electrons. Spin waves are collective excitations in ordered magnets and quantized as magnons. The propagation of magnons does not involve the electron motion and produces no Joule heating, which can overcome the increasing significant issue of heating dissipation in electronic devices. Thus, magnon-based devices have important application prospect in low-power information storage and computing. In this review, we first introduce the recent advances in the excitation, propagation, manipulation, detection of spin waves and magnon-based devices. Then, we mainly discussed the works from our group to inspire more possibilities in this area. This part is described from four aspects: (1) chiral magnonics, including the chiral propagarion of magnetostatic spin waves, DMI-induced nonreciprocity of spin waves, spin-wave propagation at chiral interface, magnonic Goos-Hänchen effect, spin-wave lens, and magnonic Stern-Gerlach effect; (2) nonlinear magnonics, including three-magnon processes induced by DMI and noncollinear magnetic textures, skyrmion-induced magnonic frequency comb, twisted magnon frequency and Penrose superradiance; (3) topological magnonics, including magnon Hall effect, magnonic topological insulator, magnonic topological semimetal, topological edge states and highorder corner states of magnetic solitons arranged in different crystal lattices; (4) quantum magnonics, including quantum states of magnon, magnon-based hybrid quantum systems, and cavity magnonics. Finally, the future development and prospect of magnonics are analyzed and discussed.

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“…In particular, the magnon chirality can be manipulated via the modulation of the ratio of the sublattice magnetization [510,511]. The manipulation of righthanded and left-handed chiralities in antiferromagnets and ferrimagnets enables the design of chirality-based magnonic devices such as field-effect transistor [512] and chirality-based logic devices [513,514].…”

Section: Antiferromagnetic Spintronicsmentioning

confidence: 99%

Chirality as Generalized Spin-Orbit Interaction in Spintronics

Chen¹,

Luo²,

Bauer³

2022

Preprint

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Chirality or handedness is a digital relation between three vectors that distinguishes an object from its mirror image, such as the spread fingers of the right and left hand. The chirality of ground state magnetic textures defined by the vectors of magnetization, its gradient, and an electric field from broken inversion symmetry can be fixed by a strong relativistic spin-orbit interaction. This review focuses on the chirality observed in the excited states of the magnetic order, dielectrics, and conductors that hold transverse spins when they are evanescent. Even without any relativistic effect, the transverse spin of the evanescent waves are locked to the momentum and the surface normal of their propagation plane. This chirality thereby acts as a generalized spin-orbit interaction, which leads to the discovery of various chiral interactions between magnetic, phononic, electronic, photonic, and plasmonic excitations in spintronics that mediate the excitation of quasiparticles into a single direction, leading to phenomena such as chiral spin and phonon pumping, chiral spin Seebeck, spin skin, magnonic trap, magnon Doppler, and spin diode effects. Intriguing analogies with electric counterparts in the nano-optics and plasmonics exist. After a brief review of the concepts of chirality that characterize the ground state chiral magnetic textures and chirally coupled magnets in spintronics, we turn to the chiral phenomena of excited states. We present a unified electrodynamic picture for dynamical chirality in spintronics in terms of generalized spin-orbit interaction and compare it with that in nano-optics and plasmonics. Based on the general theory, we subsequently review the theoretical progress and experimental evidence of chiral interaction, as well as the near-field transfer of the transverse spins, between various excitations in magnetic, photonic, electronic and phononic nanostructures at GHz time scales. We provide a perspective for future research before concluding this article.

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Chiral logic computing with twisted antiferromagnetic magnon modes

Cited by 27 publications

References 53 publications

Switching magnon chirality in artificial ferrimagnet

Switching magnon chirality in artificial ferrimagnet

Topological states and quantum effects in magnonics

Chirality as Generalized Spin-Orbit Interaction in Spintronics

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