Thermal skyrmion diffusion used in a reshuffler device
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10399566" target="_blank" >RIV/00216208:11320/19:10399566 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=6Jzo897l76" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=6Jzo897l76</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41565-019-0436-8" target="_blank" >10.1038/s41565-019-0436-8</a>
Alternative languages
Result language
angličtina
Original language name
Thermal skyrmion diffusion used in a reshuffler device
Original language description
Magnetic skyrmions in thin films can be efficiently displaced with high speed by using spin-transfer torques(1,2) and spin-orbit torques(3-5) at low current densities. Although this favourable combination of properties has raised expectations for using skyrmions in devices(6,7), only a few publications have studied the thermal effects on the skyrmion dynamics(8-10). However, thermally induced skyrmion dynamics can be used for applications(11) such as unconventional computing approaches(12), as they have been predicted to be useful for probabilistic computing devices(13). In our work, we uncover thermal diffusive skyrmion dynamics by a combined experimental and numerical study. We probed the dynamics of magnetic skyrmions in a specially tailored low-pinning multilayer material. The observed thermally excited skyrmion motion dominates the dynamics. Analysing the diffusion as a function of temperature, we found an exponential dependence, which we confirmed by means of numerical simulations. The diffusion of skyrmions was further used in a signal reshuffling device as part of a skyrmion-based probabilistic computing architecture. Owing to its inherent two-dimensional texture, the observation of a diffusive motion of skyrmions in thin-film systems may also yield insights in soft-matter-like characteristics (for example, studies of fluctuation theorems, thermally induced roughening and so on), which thus makes it highly desirable to realize and study thermal effects in experimentally accessible skyrmion systems.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nature Nanotechnology
ISSN
1748-3387
e-ISSN
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Volume of the periodical
14
Issue of the periodical within the volume
7
Country of publishing house
GB - UNITED KINGDOM
Number of pages
6
Pages from-to
658-663
UT code for WoS article
000473760300015
EID of the result in the Scopus database
2-s2.0-85064765370