Pattern generation and symbolic dynamics in a nanocontact vortex oscillator

Jeremy Letang; Myoung-Woo Yoo; Damien Rontani; Sébastien Petit-Watelot; Thibaut Devolder; Marc Sciamanna; Karim Bouzehouane; Vincent Cros; Joo-Von Kim

doi:https://doi.org/10.1038/s41467-020-14328-7

Pattern generation and symbolic dynamics in a nanocontact vortex oscillator

Jeremy Letang, Myoung-Woo Yoo, Damien Rontani, Sébastien Petit-Watelot, Thibaut Devolder, Marc Sciamanna, Karim Bouzehouane, Vincent Cros, Joo-Von Kim

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

Abstract

Harnessing chaos or intrinsic nonlinear behaviours of dynamical systems is a promising avenue toward unconventional information processing technologies. In this light, spintronic devices are promising because of the inherent nonlinearity of magnetization dynamics. Here, we demonstrate experimentally the potential for chaos-based schemes using nanocontact vortex oscillators by unveiling and characterizing their waveform patterns and symbolic dynamics using time-resolved electrical measurements. We dissociate nonlinear deterministic patterns from thermal fluctuations and show that the emergence of chaos results in the unpredictable alternation of well-defined patterns. With phase-space reconstruction techniques, we perform symbolic analyses of the time series and show that the oscillator exhibits maximal entropy and complexity at the centre of its incommensurate region. This suggests
that such vortex-based systems are promising nanoscale sources of entropy that could be exploited for information processing

Original language	English
Journal	Nature Communications
Volume	11
Issue number	601
DOIs	https://doi.org/10.1038/s41467-020-14328-7
Publication status	Published - 30 Jan 2020
Externally published	Yes

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2020_Yoo_NatureComm_11_601Final published version, 1.44 MBLicence: CC BY

Cite this

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title = "Pattern generation and symbolic dynamics in a nanocontact vortex oscillator",

abstract = "Harnessing chaos or intrinsic nonlinear behaviours of dynamical systems is a promising avenue toward unconventional information processing technologies. In this light, spintronic devices are promising because of the inherent nonlinearity of magnetization dynamics. Here, we demonstrate experimentally the potential for chaos-based schemes using nanocontact vortex oscillators by unveiling and characterizing their waveform patterns and symbolic dynamics using time-resolved electrical measurements. We dissociate nonlinear deterministic patterns from thermal fluctuations and show that the emergence of chaos results in the unpredictable alternation of well-defined patterns. With phase-space reconstruction techniques, we perform symbolic analyses of the time series and show that the oscillator exhibits maximal entropy and complexity at the centre of its incommensurate region. This suggeststhat such vortex-based systems are promising nanoscale sources of entropy that could be exploited for information processing",

author = "Jeremy Letang and Myoung-Woo Yoo and Damien Rontani and S{\'e}bastien Petit-Watelot and Thibaut Devolder and Marc Sciamanna and Karim Bouzehouane and Vincent Cros and Joo-Von Kim",

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TY - JOUR

T1 - Pattern generation and symbolic dynamics in a nanocontact vortex oscillator

AU - Letang, Jeremy

AU - Yoo, Myoung-Woo

AU - Rontani, Damien

AU - Petit-Watelot, Sébastien

AU - Devolder, Thibaut

AU - Sciamanna, Marc

AU - Bouzehouane, Karim

AU - Cros, Vincent

AU - Kim, Joo-Von

PY - 2020/1/30

Y1 - 2020/1/30

N2 - Harnessing chaos or intrinsic nonlinear behaviours of dynamical systems is a promising avenue toward unconventional information processing technologies. In this light, spintronic devices are promising because of the inherent nonlinearity of magnetization dynamics. Here, we demonstrate experimentally the potential for chaos-based schemes using nanocontact vortex oscillators by unveiling and characterizing their waveform patterns and symbolic dynamics using time-resolved electrical measurements. We dissociate nonlinear deterministic patterns from thermal fluctuations and show that the emergence of chaos results in the unpredictable alternation of well-defined patterns. With phase-space reconstruction techniques, we perform symbolic analyses of the time series and show that the oscillator exhibits maximal entropy and complexity at the centre of its incommensurate region. This suggeststhat such vortex-based systems are promising nanoscale sources of entropy that could be exploited for information processing

AB - Harnessing chaos or intrinsic nonlinear behaviours of dynamical systems is a promising avenue toward unconventional information processing technologies. In this light, spintronic devices are promising because of the inherent nonlinearity of magnetization dynamics. Here, we demonstrate experimentally the potential for chaos-based schemes using nanocontact vortex oscillators by unveiling and characterizing their waveform patterns and symbolic dynamics using time-resolved electrical measurements. We dissociate nonlinear deterministic patterns from thermal fluctuations and show that the emergence of chaos results in the unpredictable alternation of well-defined patterns. With phase-space reconstruction techniques, we perform symbolic analyses of the time series and show that the oscillator exhibits maximal entropy and complexity at the centre of its incommensurate region. This suggeststhat such vortex-based systems are promising nanoscale sources of entropy that could be exploited for information processing

U2 - https://doi.org/10.1038/s41467-020-14328-7

DO - https://doi.org/10.1038/s41467-020-14328-7

M3 - Article

SN - 2041-1723

VL - 11

JO - Nature Communications

JF - Nature Communications

IS - 601

ER -

Pattern generation and symbolic dynamics in a nanocontact vortex oscillator

Abstract

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