Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice

Artificial spin ices (ASIs) are interacting arrays of lithographically defined nanomagnets in which novel, frustrated magnetic phases can be intentionally designed. A key emergent description of fundamental excitations in ASIs is that of magnetic monopoles—mobile quasiparticles that carry an effecti...

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Autores principales:	M. Goryca, X. Zhang, J. Li, A. L. Balk, J. D. Watts, C. Leighton, C. Nisoli, P. Schiffer, S. A. Crooker
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/ff85b0e1446c4a1ba83d76929db00326
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spelling	oai:doaj.org-article:ff85b0e1446c4a1ba83d76929db003262021-12-02T13:38:13ZField-Induced Magnetic Monopole Plasma in Artificial Spin Ice10.1103/PhysRevX.11.0110422160-3308https://doaj.org/article/ff85b0e1446c4a1ba83d76929db003262021-03-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.011042http://doi.org/10.1103/PhysRevX.11.011042https://doaj.org/toc/2160-3308Artificial spin ices (ASIs) are interacting arrays of lithographically defined nanomagnets in which novel, frustrated magnetic phases can be intentionally designed. A key emergent description of fundamental excitations in ASIs is that of magnetic monopoles—mobile quasiparticles that carry an effective magnetic charge. Here, we demonstrate that the archetypal square ASI lattice can host, in specific regions of its magnetic phase diagram, plasmalike regimes containing a high density of mobile magnetic monopoles. These regimes result from the magnetic field-tunable tension on the Dirac strings connecting mobile monopoles. By passively “listening” to spontaneous monopole noise under conditions of strict thermal equilibrium, we reveal their intrinsic dynamics and show that monopole kinetics are most diffusive (that is, minimally correlated) in the plasma regime. These results open the door to on-demand monopole regimes having continuously field-tunable densities and dynamic properties, thereby providing a new paradigm for probing the physics of effective magnetic charges in synthetic matter.M. GorycaX. ZhangJ. LiA. L. BalkJ. D. WattsC. LeightonC. NisoliP. SchifferS. A. CrookerAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 1, p 011042 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 M. Goryca X. Zhang J. Li A. L. Balk J. D. Watts C. Leighton C. Nisoli P. Schiffer S. A. Crooker Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice
description	Artificial spin ices (ASIs) are interacting arrays of lithographically defined nanomagnets in which novel, frustrated magnetic phases can be intentionally designed. A key emergent description of fundamental excitations in ASIs is that of magnetic monopoles—mobile quasiparticles that carry an effective magnetic charge. Here, we demonstrate that the archetypal square ASI lattice can host, in specific regions of its magnetic phase diagram, plasmalike regimes containing a high density of mobile magnetic monopoles. These regimes result from the magnetic field-tunable tension on the Dirac strings connecting mobile monopoles. By passively “listening” to spontaneous monopole noise under conditions of strict thermal equilibrium, we reveal their intrinsic dynamics and show that monopole kinetics are most diffusive (that is, minimally correlated) in the plasma regime. These results open the door to on-demand monopole regimes having continuously field-tunable densities and dynamic properties, thereby providing a new paradigm for probing the physics of effective magnetic charges in synthetic matter.
format	article
author	M. Goryca X. Zhang J. Li A. L. Balk J. D. Watts C. Leighton C. Nisoli P. Schiffer S. A. Crooker
author_facet	M. Goryca X. Zhang J. Li A. L. Balk J. D. Watts C. Leighton C. Nisoli P. Schiffer S. A. Crooker
author_sort	M. Goryca
title	Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice
title_short	Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice
title_full	Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice
title_fullStr	Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice
title_full_unstemmed	Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice
title_sort	field-induced magnetic monopole plasma in artificial spin ice
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/ff85b0e1446c4a1ba83d76929db00326
work_keys_str_mv	AT mgoryca fieldinducedmagneticmonopoleplasmainartificialspinice AT xzhang fieldinducedmagneticmonopoleplasmainartificialspinice AT jli fieldinducedmagneticmonopoleplasmainartificialspinice AT albalk fieldinducedmagneticmonopoleplasmainartificialspinice AT jdwatts fieldinducedmagneticmonopoleplasmainartificialspinice AT cleighton fieldinducedmagneticmonopoleplasmainartificialspinice AT cnisoli fieldinducedmagneticmonopoleplasmainartificialspinice AT pschiffer fieldinducedmagneticmonopoleplasmainartificialspinice AT sacrooker fieldinducedmagneticmonopoleplasmainartificialspinice
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Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice

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