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Towards artificial Ising spin glasses: Thermal ordering in randomized arrays of Ising-type nanomagnets

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Saccone Michael, Scholl Andreas, Velten Sven, Dhuey Scott, Hofhuis Kevin, Wuth Clemens, Huang Yen-Lin, Chen Zuhuang, Chopdekar Rajesh V., Farhan Alan,
Project Emergent Phenomena in Artificial Frustrated Systems and Oxide Superlattices
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Original article (peer-reviewed)

Journal Physical Review B
Volume (Issue) 99(22)
Page(s) 224403 - 224403
Title of proceedings Physical Review B
DOI 10.1103/physrevb.99.224403

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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