Electrical detection of individual skyrmions in graphene devices

F. Finocchiaro; J. L. Lado; J. Fernandez-Rossier

doi:10.1103/PhysRevB.96.155422

Electrical detection of individual skyrmions in graphene devices

F. Finocchiaro
, J. L. Lado
, J. Fernandez-Rossier

Not published at Aalto University

Research output: Contribution to journal › Article › Scientific › peer-review

3 Citations (Scopus)

Abstract

We study a graphene Hall probe located on top of a magnetic surface as a detector of skyrmions, using as a working principle the anomalous Hall effect produced by the exchange interaction of the graphene electrons with the noncoplanar magnetization of the skyrmion. We study the magnitude of the effect as a function of the exchange interaction, skyrmion size, and device dimensions. Our calculations for multiterminal graphene nanodevices, working in the ballistic regime, indicate that for realistic exchange interactions a single skyrmion would give Hall voltages well within reach of the experimental state of the art. The proposed device could act as an electrical transducer that marks the presence of a single skyrmion in a nanoscale region, paving the way towards the integration of skyrmion-based spintronics and graphene electronics.

Original language	English
Article number	155422
Journal	Physical Review B
Volume	96
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevB.96.155422
Publication status	Published - 9 Oct 2017
MoE publication type	A1 Journal article-refereed

Funding

The authors acknowledge financial support by Marie-Curie-ITN 607904-SPINOGRAPH. J.F.-R. acknowledges financial supported by MEC-Spain (FIS2013-47328-C2-2-P and MAT2016-78625-C2) and Generalitat Valenciana (ACOMP/2010/070), Prometeo, by ERDF funds through the Portuguese Operational Program for Competitiveness and Internationalization COMPETE 2020, and National Funds through FCT, the Portuguese Foundation for Science and Technology, under Project No. PTDC/FIS-NAN/4662/2014 (016656). This work has been financially supported in part by FEDER funds. J.L.L. and F.F. are grateful for the hospitality of the Departamento de Fisica Aplicada at the Universidad de Alicante. We are grateful to F. Guinea, P. San-Jose, and N. Garcia-Martinez for useful discussions.

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10.1103/PhysRevB.96.155422

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title = "Electrical detection of individual skyrmions in graphene devices",

abstract = "We study a graphene Hall probe located on top of a magnetic surface as a detector of skyrmions, using as a working principle the anomalous Hall effect produced by the exchange interaction of the graphene electrons with the noncoplanar magnetization of the skyrmion. We study the magnitude of the effect as a function of the exchange interaction, skyrmion size, and device dimensions. Our calculations for multiterminal graphene nanodevices, working in the ballistic regime, indicate that for realistic exchange interactions a single skyrmion would give Hall voltages well within reach of the experimental state of the art. The proposed device could act as an electrical transducer that marks the presence of a single skyrmion in a nanoscale region, paving the way towards the integration of skyrmion-based spintronics and graphene electronics.",

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N2 - We study a graphene Hall probe located on top of a magnetic surface as a detector of skyrmions, using as a working principle the anomalous Hall effect produced by the exchange interaction of the graphene electrons with the noncoplanar magnetization of the skyrmion. We study the magnitude of the effect as a function of the exchange interaction, skyrmion size, and device dimensions. Our calculations for multiterminal graphene nanodevices, working in the ballistic regime, indicate that for realistic exchange interactions a single skyrmion would give Hall voltages well within reach of the experimental state of the art. The proposed device could act as an electrical transducer that marks the presence of a single skyrmion in a nanoscale region, paving the way towards the integration of skyrmion-based spintronics and graphene electronics.

AB - We study a graphene Hall probe located on top of a magnetic surface as a detector of skyrmions, using as a working principle the anomalous Hall effect produced by the exchange interaction of the graphene electrons with the noncoplanar magnetization of the skyrmion. We study the magnitude of the effect as a function of the exchange interaction, skyrmion size, and device dimensions. Our calculations for multiterminal graphene nanodevices, working in the ballistic regime, indicate that for realistic exchange interactions a single skyrmion would give Hall voltages well within reach of the experimental state of the art. The proposed device could act as an electrical transducer that marks the presence of a single skyrmion in a nanoscale region, paving the way towards the integration of skyrmion-based spintronics and graphene electronics.

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VL - 96

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Electrical detection of individual skyrmions in graphene devices

Abstract

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