Thermal skyrmion diffusion used in a reshuffler device

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermal skyrmion diffusion used in a reshuffler device

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Thermal skyrmion diffusion used in a reshuffler device

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nature Nanotechnology

ISSN

1748-3387

e-ISSN

—

Svazek periodika

14

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

658-663

Kód UT WoS článku

000473760300015

EID výsledku v databázi Scopus

2-s2.0-85064765370