Reconfigurable Logic Operations via Gate Controlled Skyrmion Motion in a Nanomagnetic Device

Paikaray, Bibekananda and Kuchibhotla, Mahathi and Haldar, Arabinda and Murapaka, Chandrasekhar (2022) Reconfigurable Logic Operations via Gate Controlled Skyrmion Motion in a Nanomagnetic Device. ACS Applied Electronic Materials, 4 (5). pp. 2290-2297. ISSN 2637-6113

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Owing to the topological protection and the ease of efficient manipulation, skyrmions have emerged as potential candidates for carrying information in future memory and logic devices. Here, we have proposed a reconfigurable skyrmion based two-input logic device architecture. Using micromagnetic simulations, we have demonstrated that the device is capable of performing both OR and AND logic gate functionalities in a reconfigurable manner. Different logic functionality of the device is selected by using a current through a nonmagnetic metallic gate, and the resultant Oersted field controls the trajectory of the skyrmion, which in turn determines the logic states. The logic functions are implemented on a ferromagnet/heavy metal bilayer device structure by virtue of several physical effects, such as the spin-orbit torque, skyrmion-edge repulsion, skyrmion-skyrmion topological repulsion, and skyrmion Hall effect. The skyrmion trajectory has been characterized by estimating the skyrmion Hall angle. A wide range of operations by varying the current density, skyrmion velocity, Dzyaloshinskii-Moriya interaction, magnetic anisotropy, and geometrical parameters have been presented in detail. We believe that our spin orbit torque driven logic design will have potential implications for a high-speed and low-power skyrmion based computing architecture. © 2022 American Chemical Society.

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IITH Creators:
IITH CreatorsORCiD
Haldar, Arabinda
Murapaka, Chandrasekhar
Item Type: Article
Additional Information: C.M. would like to acknowledge funding from a SERB-Early Career Research Award (ECR/2018/002664). A.H. would like to acknowledge funding from a Ramanujan Fellowship (SB/S2/RJN-118/2016), Department of Science and Technology, India. B.P. would like to acknowledge a fellowship from the Department of Science and Technology, India (DST/INSPIRE Fellowship/[IF180927]).
Uncontrolled Keywords: reconfigurable logic; skyrmion; skyrmion Hall effect; skyrmion logic; spin-orbit torque
Subjects: Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Department of Physics
Depositing User: . LibTrainee 2021
Date Deposited: 19 Jul 2022 13:07
Last Modified: 19 Jul 2022 13:07
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