Synchronization of electrical oscillators is a crucial step toward practical implementation of oscillator-based and bio-inspired computing. Here, we report the emergence of an unusual stochastic pattern in coupled spiking Mott nanodevices. Although a moderate capacitive coupling results in a deterministic alternating spiking, increasing the coupling strength leads counterintuitively to stochastic disruptions of the alternating spiking sequence. The disruptions of the deterministic spiking sequence are a direct consequence of the small intrinsic stochasticity in electrical triggering of the insulator–metal transition. Although the stochasticity is subtle in individual nanodevices, it becomes dramatically enhanced just in a single pair of coupled oscillators and, thus, dominates the synchronization. This is different from the stochasticity and multimodal coupling, appearing due to collective effects in large oscillator networks. The stochastic spiking pattern in Mott nanodevices results in a discrete inter-spike interval distribution resembling those in biological neurons. Our results advance the understanding of the emergent synchronization properties in spiking oscillators and provide a platform for hardware-level implementation of probabilistic computing and biologically plausible electronic devices.
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27 February 2023
Research Article|
March 02 2023
Stochasticity in the synchronization of strongly coupled spiking oscillators
Special Collection:
Metal Oxide Thin-Film Electronics
Erbin Qiu
;
Erbin Qiu
a)
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Department of Electrical and Computer Engineering, University of California San Diego
, La Jolla, California 92093, USA
2
Department of Physics, Center for Advanced Nanoscience, University of California San Diego
, La Jolla, California 92093, USA
a)Author to whom correspondence should be addressed: e3qiu@eng.ucsd.edu
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Pavel Salev
;
Pavel Salev
b)
(Conceptualization, Formal analysis, Methodology, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing)
2
Department of Physics, Center for Advanced Nanoscience, University of California San Diego
, La Jolla, California 92093, USA
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Lorenzo Fratino
;
Lorenzo Fratino
c)
(Software)
3
Laboratoire de Physique des Solides, CNRS, Université Paris Saclay
, 91405 Orsay Cedex, France
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Rodolfo Rocco
;
Rodolfo Rocco
(Software)
3
Laboratoire de Physique des Solides, CNRS, Université Paris Saclay
, 91405 Orsay Cedex, France
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Henry Navarro
;
Henry Navarro
(Formal analysis, Investigation)
2
Department of Physics, Center for Advanced Nanoscience, University of California San Diego
, La Jolla, California 92093, USA
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Coline Adda
;
Coline Adda
(Formal analysis, Investigation)
2
Department of Physics, Center for Advanced Nanoscience, University of California San Diego
, La Jolla, California 92093, USA
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Junjie Li
;
Junjie Li
(Formal analysis, Investigation)
4
Materials Science and Engineering Program, University of California San Diego
, La Jolla, California 92093, USA
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Min-Han Lee
;
Min-Han Lee
(Formal analysis, Investigation)
4
Materials Science and Engineering Program, University of California San Diego
, La Jolla, California 92093, USA
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Yoav Kalcheim;
Yoav Kalcheim
(Formal analysis, Investigation)
5
Faculty of Materials Science and Engineering, Technion–Israel Institute of Technology
, Haifa 32000, Israel
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Marcelo Rozenberg
;
Marcelo Rozenberg
(Formal analysis, Investigation, Software, Supervision)
3
Laboratoire de Physique des Solides, CNRS, Université Paris Saclay
, 91405 Orsay Cedex, France
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Ivan K. Schuller
Ivan K. Schuller
(Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing)
2
Department of Physics, Center for Advanced Nanoscience, University of California San Diego
, La Jolla, California 92093, USA
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a)Author to whom correspondence should be addressed: e3qiu@eng.ucsd.edu
b)
Present address: Department of Physics and Astronomy, University of Denver, Denver, CO 80208, USA
c)
Present address: Laboratoire de Physique Théorique et Modélisation, CNRS UMR 8089, CY Cergy Paris Université, 95302 Cergy-Pontoise Cedex, France
Note: This paper is part of the APL Special Collection on Metal Oxide Thin-Film Electronics.
Appl. Phys. Lett. 122, 094105 (2023)
Article history
Received:
October 03 2022
Accepted:
February 18 2023
Citation
Erbin Qiu, Pavel Salev, Lorenzo Fratino, Rodolfo Rocco, Henry Navarro, Coline Adda, Junjie Li, Min-Han Lee, Yoav Kalcheim, Marcelo Rozenberg, Ivan K. Schuller; Stochasticity in the synchronization of strongly coupled spiking oscillators. Appl. Phys. Lett. 27 February 2023; 122 (9): 094105. https://doi.org/10.1063/5.0129205
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