Cargando…

Thermodynamics of emergent magnetic charge screening in artificial spin ice

Electric charge screening is a fundamental principle governing the behaviour in a variety of systems in nature. Through reconfiguration of the local environment, the Coulomb attraction between electric charges is decreased, leading, for example, to the creation of polaron states in solids or hydrati...

Descripción completa

Detalles Bibliográficos
Autores principales: Farhan, Alan, Scholl, Andreas, Petersen, Charlotte F., Anghinolfi, Luca, Wuth, Clemens, Dhuey, Scott, Chopdekar, Rajesh V., Mellado, Paula, Alava, Mikko J., van Dijken, Sebastiaan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5040513/
https://www.ncbi.nlm.nih.gov/pubmed/27581972
http://dx.doi.org/10.1038/ncomms12635
_version_ 1782456242602508288
author Farhan, Alan
Scholl, Andreas
Petersen, Charlotte F.
Anghinolfi, Luca
Wuth, Clemens
Dhuey, Scott
Chopdekar, Rajesh V.
Mellado, Paula
Alava, Mikko J.
van Dijken, Sebastiaan
author_facet Farhan, Alan
Scholl, Andreas
Petersen, Charlotte F.
Anghinolfi, Luca
Wuth, Clemens
Dhuey, Scott
Chopdekar, Rajesh V.
Mellado, Paula
Alava, Mikko J.
van Dijken, Sebastiaan
author_sort Farhan, Alan
collection PubMed
description Electric charge screening is a fundamental principle governing the behaviour in a variety of systems in nature. Through reconfiguration of the local environment, the Coulomb attraction between electric charges is decreased, leading, for example, to the creation of polaron states in solids or hydration shells around proteins in water. Here, we directly visualize the real-time creation and decay of screened magnetic charge configurations in a two-dimensional artificial spin ice system, the dipolar dice lattice. By comparing the temperature dependent occurrence of screened and unscreened emergent magnetic charge defects, we determine that screened magnetic charges are indeed a result of local energy reduction and appear as a transient minimum energy state before the system relaxes towards the predicted ground state. These results highlight the important role of emergent magnetic charges in artificial spin ice, giving rise to screened charge excitations and the emergence of exotic low-temperature configurations.
format Online
Article
Text
id pubmed-5040513
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-50405132016-10-13 Thermodynamics of emergent magnetic charge screening in artificial spin ice Farhan, Alan Scholl, Andreas Petersen, Charlotte F. Anghinolfi, Luca Wuth, Clemens Dhuey, Scott Chopdekar, Rajesh V. Mellado, Paula Alava, Mikko J. van Dijken, Sebastiaan Nat Commun Article Electric charge screening is a fundamental principle governing the behaviour in a variety of systems in nature. Through reconfiguration of the local environment, the Coulomb attraction between electric charges is decreased, leading, for example, to the creation of polaron states in solids or hydration shells around proteins in water. Here, we directly visualize the real-time creation and decay of screened magnetic charge configurations in a two-dimensional artificial spin ice system, the dipolar dice lattice. By comparing the temperature dependent occurrence of screened and unscreened emergent magnetic charge defects, we determine that screened magnetic charges are indeed a result of local energy reduction and appear as a transient minimum energy state before the system relaxes towards the predicted ground state. These results highlight the important role of emergent magnetic charges in artificial spin ice, giving rise to screened charge excitations and the emergence of exotic low-temperature configurations. Nature Publishing Group 2016-09-01 /pmc/articles/PMC5040513/ /pubmed/27581972 http://dx.doi.org/10.1038/ncomms12635 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Farhan, Alan
Scholl, Andreas
Petersen, Charlotte F.
Anghinolfi, Luca
Wuth, Clemens
Dhuey, Scott
Chopdekar, Rajesh V.
Mellado, Paula
Alava, Mikko J.
van Dijken, Sebastiaan
Thermodynamics of emergent magnetic charge screening in artificial spin ice
title Thermodynamics of emergent magnetic charge screening in artificial spin ice
title_full Thermodynamics of emergent magnetic charge screening in artificial spin ice
title_fullStr Thermodynamics of emergent magnetic charge screening in artificial spin ice
title_full_unstemmed Thermodynamics of emergent magnetic charge screening in artificial spin ice
title_short Thermodynamics of emergent magnetic charge screening in artificial spin ice
title_sort thermodynamics of emergent magnetic charge screening in artificial spin ice
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5040513/
https://www.ncbi.nlm.nih.gov/pubmed/27581972
http://dx.doi.org/10.1038/ncomms12635
work_keys_str_mv AT farhanalan thermodynamicsofemergentmagneticchargescreeninginartificialspinice
AT schollandreas thermodynamicsofemergentmagneticchargescreeninginartificialspinice
AT petersencharlottef thermodynamicsofemergentmagneticchargescreeninginartificialspinice
AT anghinolfiluca thermodynamicsofemergentmagneticchargescreeninginartificialspinice
AT wuthclemens thermodynamicsofemergentmagneticchargescreeninginartificialspinice
AT dhueyscott thermodynamicsofemergentmagneticchargescreeninginartificialspinice
AT chopdekarrajeshv thermodynamicsofemergentmagneticchargescreeninginartificialspinice
AT melladopaula thermodynamicsofemergentmagneticchargescreeninginartificialspinice
AT alavamikkoj thermodynamicsofemergentmagneticchargescreeninginartificialspinice
AT vandijkensebastiaan thermodynamicsofemergentmagneticchargescreeninginartificialspinice