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Shaking and pushing skyrmions: Formation of a nonequilibrium phase with zero critical current.

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Title: Shaking and pushing skyrmions: Formation of a nonequilibrium phase with zero critical current.
Authors: Rucker, Felix1, Bezvershenko, Alla2, Mettus, Denis1, Bauer, Andreas1,3, Garst, Markus4,5, Rosch, Achim2, Pfleiderer, Christian1,3,6,7 christian.pfleiderer@tum.de
Source: Proceedings of the National Academy of Sciences of the United States of America. 2/3/2026, Vol. 123 Issue 5, p1-7. 20p.
Subjects: Skyrmions, Critical currents, Magnetic fields, Magnets, Spin-polarized currents, Nonequilibrium thermodynamics
Abstract: In three-dimensional chiral magnets, skyrmions are line-like objects oriented parallel to the applied magnetic field. The efficient coupling of magnetic skyrmion lattices to spin currents and magnetic fields permits their dynamical manipulation. Here, we explore the dynamics of skyrmion lattices when slowly oscillating the field direction by up to a few degrees on millisecond timescales while simultaneously pushing the skyrmion lattice by electric currents. The field oscillations induce a shaking of the orientation of the skyrmion lines, leading to a phase where the critical depinning current for translational motion vanishes. We measure the transverse susceptibility of MnSi to track various depinning phase transitions induced by currents, oscillating fields, or combinations thereof. An effective slip-stick model for the bending and motion of the skyrmion lines in the presence of disorder explains main features of the experiment and predicts the existence of several dynamical skyrmion lattice phases under shaking and pushing representing phases of matter far from thermal equilibrium. [ABSTRACT FROM AUTHOR]
Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 191600099
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Shaking and pushing skyrmions: Formation of a nonequilibrium phase with zero critical current.
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  Data: <searchLink fieldCode="AR" term="%22Rucker%2C+Felix%22">Rucker, Felix</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bezvershenko%2C+Alla%22">Bezvershenko, Alla</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Mettus%2C+Denis%22">Mettus, Denis</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bauer%2C+Andreas%22">Bauer, Andreas</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Garst%2C+Markus%22">Garst, Markus</searchLink><relatesTo>4,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Rosch%2C+Achim%22">Rosch, Achim</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Pfleiderer%2C+Christian%22">Pfleiderer, Christian</searchLink><relatesTo>1,3,6,7</relatesTo><i> christian.pfleiderer@tum.de</i>
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  Data: <searchLink fieldCode="JN" term="%22Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America%22">Proceedings of the National Academy of Sciences of the United States of America</searchLink>. 2/3/2026, Vol. 123 Issue 5, p1-7. 20p.
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  Data: <searchLink fieldCode="DE" term="%22Skyrmions%22">Skyrmions</searchLink><br /><searchLink fieldCode="DE" term="%22Critical+currents%22">Critical currents</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Magnets%22">Magnets</searchLink><br /><searchLink fieldCode="DE" term="%22Spin-polarized+currents%22">Spin-polarized currents</searchLink><br /><searchLink fieldCode="DE" term="%22Nonequilibrium+thermodynamics%22">Nonequilibrium thermodynamics</searchLink>
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  Label: Abstract
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  Data: In three-dimensional chiral magnets, skyrmions are line-like objects oriented parallel to the applied magnetic field. The efficient coupling of magnetic skyrmion lattices to spin currents and magnetic fields permits their dynamical manipulation. Here, we explore the dynamics of skyrmion lattices when slowly oscillating the field direction by up to a few degrees on millisecond timescales while simultaneously pushing the skyrmion lattice by electric currents. The field oscillations induce a shaking of the orientation of the skyrmion lines, leading to a phase where the critical depinning current for translational motion vanishes. We measure the transverse susceptibility of MnSi to track various depinning phase transitions induced by currents, oscillating fields, or combinations thereof. An effective slip-stick model for the bending and motion of the skyrmion lines in the presence of disorder explains main features of the experiment and predicts the existence of several dynamical skyrmion lattice phases under shaking and pushing representing phases of matter far from thermal equilibrium. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1073/pnas.2507428123
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        Text: English
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        PageCount: 20
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      – SubjectFull: Skyrmions
        Type: general
      – SubjectFull: Critical currents
        Type: general
      – SubjectFull: Magnetic fields
        Type: general
      – SubjectFull: Magnets
        Type: general
      – SubjectFull: Spin-polarized currents
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      – SubjectFull: Nonequilibrium thermodynamics
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      – TitleFull: Shaking and pushing skyrmions: Formation of a nonequilibrium phase with zero critical current.
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              Text: 2/3/2026
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              Y: 2026
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