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Controlling avalanche criticality in 2D nano arrays

Many physical systems respond to slowly changing external force through avalanches spanning broad range of sizes. Some systems crackle even without apparent external force, such as bursts of neuronal activity or charge transfer avalanches in 2D molecular layers. Advanced development of theoretical m...

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Autores principales: Zohar, Y. C., Yochelis, S., Dahmen, K. A., Jung, G., Paltiel, Y.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3654552/
https://www.ncbi.nlm.nih.gov/pubmed/23677142
http://dx.doi.org/10.1038/srep01845
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author Zohar, Y. C.
Yochelis, S.
Dahmen, K. A.
Jung, G.
Paltiel, Y.
author_facet Zohar, Y. C.
Yochelis, S.
Dahmen, K. A.
Jung, G.
Paltiel, Y.
author_sort Zohar, Y. C.
collection PubMed
description Many physical systems respond to slowly changing external force through avalanches spanning broad range of sizes. Some systems crackle even without apparent external force, such as bursts of neuronal activity or charge transfer avalanches in 2D molecular layers. Advanced development of theoretical models describing disorder-induced critical phenomena calls for experiments probing the dynamics upon tuneable disorder. Here we show that isomeric structural transitions in 2D organic self-assembled monolayer (SAM) exhibit critical dynamics with experimentally tuneable disorder. The system consists of field effect transistor coupled through SAM to illuminated semiconducting nanocrystals (NCs). Charges photoinduced in NCs are transferred through SAM to the transistor surface and modulate its conductivity. Avalanches of isomeric structural transitions are revealed by measuring the current noise I(t) of the transistor. Accumulated surface traps charges reduce dipole moments of the molecules, decrease their coupling, and thus decrease the critical disorder of the SAM enabling its tuning during experiments.
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spelling pubmed-36545522013-05-20 Controlling avalanche criticality in 2D nano arrays Zohar, Y. C. Yochelis, S. Dahmen, K. A. Jung, G. Paltiel, Y. Sci Rep Article Many physical systems respond to slowly changing external force through avalanches spanning broad range of sizes. Some systems crackle even without apparent external force, such as bursts of neuronal activity or charge transfer avalanches in 2D molecular layers. Advanced development of theoretical models describing disorder-induced critical phenomena calls for experiments probing the dynamics upon tuneable disorder. Here we show that isomeric structural transitions in 2D organic self-assembled monolayer (SAM) exhibit critical dynamics with experimentally tuneable disorder. The system consists of field effect transistor coupled through SAM to illuminated semiconducting nanocrystals (NCs). Charges photoinduced in NCs are transferred through SAM to the transistor surface and modulate its conductivity. Avalanches of isomeric structural transitions are revealed by measuring the current noise I(t) of the transistor. Accumulated surface traps charges reduce dipole moments of the molecules, decrease their coupling, and thus decrease the critical disorder of the SAM enabling its tuning during experiments. Nature Publishing Group 2013-05-15 /pmc/articles/PMC3654552/ /pubmed/23677142 http://dx.doi.org/10.1038/srep01845 Text en Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
spellingShingle Article
Zohar, Y. C.
Yochelis, S.
Dahmen, K. A.
Jung, G.
Paltiel, Y.
Controlling avalanche criticality in 2D nano arrays
title Controlling avalanche criticality in 2D nano arrays
title_full Controlling avalanche criticality in 2D nano arrays
title_fullStr Controlling avalanche criticality in 2D nano arrays
title_full_unstemmed Controlling avalanche criticality in 2D nano arrays
title_short Controlling avalanche criticality in 2D nano arrays
title_sort controlling avalanche criticality in 2d nano arrays
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3654552/
https://www.ncbi.nlm.nih.gov/pubmed/23677142
http://dx.doi.org/10.1038/srep01845
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