Towards artificial Ising spin glasses

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2019-06-03
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Mcode
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Language
en
Pages
7
Series
Physical Review B, Volume 99, issue 22
Abstract
We explore the thermodynamics in two-dimensional arrays consisting of Ising-type nanomagnets lithographically arranged onto random sites and angular orientations. Introducing these basic spin-glass ingredients, we study the characteristic features of the low-energy states achieved, following thermal-annealing protocols. From direct visualization of real-time dynamics, we record relaxation timescales together with magnetic susceptibility variations over temperature, revealing trends towards short-range order as randomness is increased, but falling short of pure spin-glass behavior. Our work provides a route towards the realization of artificial Ising spin-glass systems.
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Keywords
CRITICAL EXPONENTS, ICE, ENERGY
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Citation
Saccone , M , Scholl , A , Velten , S , Dhuey , S , Hofhuis , K , Wuth , C , Huang , Y-L , Chen , Z , Chopdekar , R & Farhan , A 2019 , ' Towards artificial Ising spin glasses : Thermal ordering in randomized arrays of Ising-type nanomagnets ' , Physical Review B , vol. 99 , no. 22 , 224403 . https://doi.org/10.1103/PhysRevB.99.224403