Skyrmionic interconnect device

Chen, Runze; Liu, Yu; Pavlidis, Vasilis F.; Moutafis, Christoforos

doi:10.1103/physrevresearch.2.043312

Cited by 20 publications

(22 citation statements)

References 56 publications

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“…It is worth mentioning that the notation of the antiskyrmionite in this work is for consistency to our previous publication. 34 This approach exhibits superior thermodynamic stability than notch-based devices, as evidenced by our thermal stability analyses on the nanotrack. We then demonstrate the effective tunability of the device performance and information transmission energy.…”

Section: Introductionmentioning

confidence: 79%

“… 36 Because the quasiparticles present slightly different velocities under SOT on the nanotrack, 6 it is crucial to introduce synchronizers in the device both for precise detection and information integrity. 34 It should be noted that the magnetic tunnelling junction (MTJ) reading heads are illustrated for signal detection in Figure 1 merely as an example. Besides MTJ detectors, 37 we could also utilize other detection techniques, such as measuring the topological Hall effect (THE) 4 , 38 and hinge spin polarization.…”

Section: Resultsmentioning

confidence: 99%

“…The results displayed in panel (d) are in perfect consistency with the calculations in our previous work. 34 It should be noted that the energy for the quasiparticles shown in panels (c) and (d) is refined with respect to the quasiparticles’ corresponding initial states to facilitate better visualization and comparison.…”

Section: Resultsmentioning

confidence: 99%

“…The notch-based nanotrack design has been frequently utilized in recent numerical studies. 11 , 20 , 34 However, to avoid insidious risks that include likelihoods of pinning and annihilation at notches/edges and to achieve effective performance tunability require the design of more realistic and robust spintronic interconnect devices.…”

Section: Introductionmentioning

confidence: 99%

“… 33 Here, we explore alternative nonvolatile and energy efficient information transfer through signal multiplexing using spintronic devices. In our recent work, a prototype of notch-based interconnect device was proposed, 34 which can perform topological filtering that enables signal multiplexing utilizing sequences of magnetic skyrmions and skyrmioniums. The notch-based nanotrack design has been frequently utilized in recent numerical studies.…”

Section: Introductionmentioning

confidence: 99%

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Voltage-Controlled Skyrmionic Interconnect with Multiple Magnetic Information Carriers

Chen

Liu

2022

ACS Appl. Mater. Interfaces

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Magnetic skyrmions have been in the spotlight since they were observed in technologically relevant systems at room temperature. More recently, there has been increasing interest in additional quasiparticles that may exist as stable/metastable spin textures in magnets, such as the skyrmionium and the antiskyrmionite (i.e., a skyrmion bag with two skyrmions inside) that have distinct topological characteristics. The next challenge and opportunity, at the same time, is to investigate the use of multiple magnetic quasiparticles as information carriers in a single device for next-generation nanocomputing. In this paper, we propose a spintronic interconnect device where multiple sequences of information signals are encoded and transmitted simultaneously by skyrmions, skyrmioniums, and antiskyrmionites. The proposed spintronic interconnect device can be pipelined via voltage-controlled magnetic anisotropy (VCMA) gated synchronizers that behave as intermediate registers. We demonstrate theoretically that the interconnect throughput and transmission energy can be effectively tuned by the VCMA gate voltage and appropriate electric current pulses. By carefully adjusting the device structure characteristics, our spintronic interconnect device exhibits comparable energy efficiency with copper interconnects in mainstream CMOS technologies. This study provides fresh insight into the possibilities of skyrmionic devices in future spintronic applications.

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Section: Introductionmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Voltage-Controlled Skyrmionic Interconnect with Multiple Magnetic Information Carriers

Chen

Liu

2022

ACS Appl. Mater. Interfaces

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Skyrmion‐Bubble Bundles in an X‐Type Sr₂Co₂Fe₂₈O₄₆ Hexaferrite above Room Temperature

Tang,

Wu,

Jiang

et al. 2023

Advanced Materials

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Magnetic skyrmions are spin swirls that possess topological nontriviality and are considered particle‐like entities. They are distinguished by an integer topological charge Q. The presence of skyrmion bundles provides an opportunity to explore the range of values for Q, which is crucial for the advancement of topological spintronic devices with multi‐Q properties. In this study, we present a new material candidate, Sr2Co2Fe28O46 hexaferrite of the X‐type, which hosts small dipolar skyrmions at room temperature and above. By exploiting reversed magnetic fields from metastable skyrmion bubbles at zero fields, we can incorporate skyrmion‐bubble bundles with different interior skyrmion/bubble numbers, topological charges, and morphologies at room temperature. Our experimental findings are consistently supported by micromagnetic simulations. Our results highlight the versatility of topological spin textures in centrosymmetric uniaxial magnets, thereby paving the way for the development of room‐temperature topological spintronic devices with multi‐Q characteristics.This article is protected by copyright. All rights reserved

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Embedded Skyrmion Bags in Thin Films of Chiral Magnets

Yang,

Savchenko,

Zheng

et al. 2024

Advanced Materials

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Magnetic skyrmions are topologically nontrivial spin configurations that possess particle‐like properties. Earlier research has mainly focused on a specific type of skyrmion with topological charge Q = −1. However, theoretical analyses of 2D chiral magnets have predicted the existence of skyrmion bags—solitons with arbitrary positive or negative topological charge. Although such spin textures are metastable states, recent experimental observations have confirmed the stability of isolated skyrmion bags in a limited range of applied magnetic fields. Here, by utilizing Lorentz transmission electron microscopy, the extraordinary stability of skyrmion bags in thin plates of B20‐type FeGe is shown. In particular, it is shown that skyrmion bags embedded within a skyrmion lattice remain stable even in zero or inverted external magnetic fields. A robust protocol for nucleating such embedded skyrmion bags is provided. The results agree perfectly with micromagnetic simulations and establish thin plates of cubic chiral magnets as a powerful platform for exploring a broad spectrum of topological magnetic solitons.

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Skyrmionic interconnect device

Cited by 20 publications

References 56 publications

Voltage-Controlled Skyrmionic Interconnect with Multiple Magnetic Information Carriers

Voltage-Controlled Skyrmionic Interconnect with Multiple Magnetic Information Carriers

Skyrmion‐Bubble Bundles in an X‐Type Sr₂Co₂Fe₂₈O₄₆ Hexaferrite above Room Temperature

Embedded Skyrmion Bags in Thin Films of Chiral Magnets

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Skyrmionic interconnect device

Cited by 20 publications

References 56 publications

Voltage-Controlled Skyrmionic Interconnect with Multiple Magnetic Information Carriers

Voltage-Controlled Skyrmionic Interconnect with Multiple Magnetic Information Carriers

Skyrmion‐Bubble Bundles in an X‐Type Sr2Co2Fe28O46 Hexaferrite above Room Temperature

Embedded Skyrmion Bags in Thin Films of Chiral Magnets

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Product

Resources

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Skyrmion‐Bubble Bundles in an X‐Type Sr₂Co₂Fe₂₈O₄₆ Hexaferrite above Room Temperature