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

Michael Saccone; Andreas Scholl; Sven Velten; Scott Dhuey; Kevin Hofhuis; Clemens Wuth; Yen Lin Huang; Zuhuang Chen; Rajesh V. Chopdekar; Alan Farhan

doi:10.1103/PhysRevB.99.224403

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

Michael Saccone
, Andreas Scholl
, Sven Velten
, Scott Dhuey
, Kevin Hofhuis
, Clemens Wuth
, Yen Lin Huang
, Zuhuang Chen
, Rajesh V. Chopdekar
, Alan Farhan

University of California at Santa Cruz
Lawrence Berkeley National Laboratory
University of Hamburg
ETH Zurich
Paul Scherrer Institute
University of California at Berkeley
Harbin Institute of Technology
Aalto University

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

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.

Original language	English
Article number	224403
Journal	Physical Review B
Volume	99
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.99.224403
State	Published - 3 Jun 2019
Externally published	Yes

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10.1103/PhysRevB.99.224403

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title = "Towards artificial Ising spin glasses: Thermal ordering in randomized arrays of Ising-type nanomagnets",

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.",

author = "Michael Saccone and Andreas Scholl and Sven Velten and Scott Dhuey and Kevin Hofhuis and Clemens Wuth and Huang, \{Yen Lin\} and Zuhuang Chen and Chopdekar, \{Rajesh V.\} and Alan Farhan",

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doi = "10.1103/PhysRevB.99.224403",

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AU - Saccone, Michael

AU - Scholl, Andreas

AU - Velten, Sven

AU - Dhuey, Scott

AU - Hofhuis, Kevin

AU - Wuth, Clemens

AU - Huang, Yen Lin

AU - Chen, Zuhuang

AU - Chopdekar, Rajesh V.

AU - Farhan, Alan

PY - 2019/6/3

Y1 - 2019/6/3

N2 - 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.

AB - 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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DO - 10.1103/PhysRevB.99.224403

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JO - Physical Review B

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ER -

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

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