Thermodynamics of emergent magnetic charge screening in artificial spin ice
Abstract
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.
- Authors:
-
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Aalto Univ., Otaniemi (Finland). School of Science
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Aalto Univ., Otaniemi (Finland)
- Universita di Genova, Genova (Italy)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Daegu Gyeongbuk Institute of Science and Technology (DGIST)., Daegu (Korea, Republic of)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States), Molecular Foundry
- Univ. of California, Davis, CA (United States). Dept. of Materials Science and Engineering
- Adolfo Ibanez Univ., Santiago (Chile)
- Aalto Univ., Otaniemi (Finland). School of Science
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1377456
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 7; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ferromagnetism; magnetic properties and materials; metamaterials
Citation Formats
Farhan, Alan, Scholl, Andreas, Petersen, Charlotte F., Anghinolfi, Luca, Wuth, Clemens, Dhuey, Scott, Chopdekar, Rajesh V., Mellado, Paula, Alava, Mikko J., and van Dijken, Sebastiaan. Thermodynamics of emergent magnetic charge screening in artificial spin ice. United States: N. p., 2016.
Web. doi:10.1038/ncomms12635.
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. United States. https://doi.org/10.1038/ncomms12635
Farhan, Alan, Scholl, Andreas, Petersen, Charlotte F., Anghinolfi, Luca, Wuth, Clemens, Dhuey, Scott, Chopdekar, Rajesh V., Mellado, Paula, Alava, Mikko J., and van Dijken, Sebastiaan. 2016.
"Thermodynamics of emergent magnetic charge screening in artificial spin ice". United States. https://doi.org/10.1038/ncomms12635. https://www.osti.gov/servlets/purl/1377456.
@article{osti_1377456,
title = {Thermodynamics of emergent magnetic charge screening in artificial spin ice},
author = {Farhan, Alan and Scholl, Andreas and Petersen, Charlotte F. and Anghinolfi, Luca and Wuth, Clemens and Dhuey, Scott and Chopdekar, Rajesh V. and Mellado, Paula and Alava, Mikko J. and van Dijken, Sebastiaan},
abstractNote = {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.},
doi = {10.1038/ncomms12635},
url = {https://www.osti.gov/biblio/1377456},
journal = {Nature Communications},
issn = {2041-1723},
number = ,
volume = 7,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2016},
month = {Thu Sep 01 00:00:00 EDT 2016}
}
Web of Science
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