Controlled creation and annihilation of isolated robust emergent magnetic monopole like charged vertices in square artificial spin ice
Abstract Magnetic analogue of an isolated free electric charge, i.e., a magnet with a single north or south pole, is a long sought-after particle which remains elusive so far. In magnetically frustrated pyrochlore solids, a classical analogue of monopole was observed as a result of excitation of spi...
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ftdoajarticles:oai:doaj.org/article:747ca22ec28e4473aea49cf64c6a28bd 2023-05-15T18:22:42+02:00 Controlled creation and annihilation of isolated robust emergent magnetic monopole like charged vertices in square artificial spin ice Neeti Keswani Ricardo J. C. Lopes Yoshikata Nakajima Ranveer Singh Neha Chauhan Tapobrata Som D. Sakthi Kumar Afranio R. Pereira Pintu Das 2021-06-01T00:00:00Z https://doi.org/10.1038/s41598-021-92877-7 https://doaj.org/article/747ca22ec28e4473aea49cf64c6a28bd EN eng Nature Portfolio https://doi.org/10.1038/s41598-021-92877-7 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-021-92877-7 2045-2322 https://doaj.org/article/747ca22ec28e4473aea49cf64c6a28bd Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021) Medicine R Science Q article 2021 ftdoajarticles https://doi.org/10.1038/s41598-021-92877-7 2022-12-31T05:03:29Z Abstract Magnetic analogue of an isolated free electric charge, i.e., a magnet with a single north or south pole, is a long sought-after particle which remains elusive so far. In magnetically frustrated pyrochlore solids, a classical analogue of monopole was observed as a result of excitation of spin ice vertices. Direct visualization of such excitations were proposed and later confirmed in analogous artificial spin ice (ASI) systems of square as well as Kagome geometries. However, such magnetically charged vertices are randomly created as they are thermally driven and are always associated with corresponding equal and opposite emergent charges, often termed as monopole–antimonopole pairs, connected by observable strings. Here, we demonstrate a controlled stabilisation of a robust isolated emergent monopole-like magnetically charged vertices in individual square ASI systems by application of an external magnetic field. The excitation conserves the magnetic charge without the involvement of a corresponding excitation of opposite charge. Well supported by Monte Carlo simulations our experimental results enable, in absence of a true elemental magnetic monopole, creation of electron vortices and studying electrodynamics in presence of a monopole-like field in a solid state environment. Article in Journal/Newspaper South pole Directory of Open Access Journals: DOAJ Articles South Pole Scientific Reports 11 1 |
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Medicine R Science Q |
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Medicine R Science Q Neeti Keswani Ricardo J. C. Lopes Yoshikata Nakajima Ranveer Singh Neha Chauhan Tapobrata Som D. Sakthi Kumar Afranio R. Pereira Pintu Das Controlled creation and annihilation of isolated robust emergent magnetic monopole like charged vertices in square artificial spin ice |
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Medicine R Science Q |
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Abstract Magnetic analogue of an isolated free electric charge, i.e., a magnet with a single north or south pole, is a long sought-after particle which remains elusive so far. In magnetically frustrated pyrochlore solids, a classical analogue of monopole was observed as a result of excitation of spin ice vertices. Direct visualization of such excitations were proposed and later confirmed in analogous artificial spin ice (ASI) systems of square as well as Kagome geometries. However, such magnetically charged vertices are randomly created as they are thermally driven and are always associated with corresponding equal and opposite emergent charges, often termed as monopole–antimonopole pairs, connected by observable strings. Here, we demonstrate a controlled stabilisation of a robust isolated emergent monopole-like magnetically charged vertices in individual square ASI systems by application of an external magnetic field. The excitation conserves the magnetic charge without the involvement of a corresponding excitation of opposite charge. Well supported by Monte Carlo simulations our experimental results enable, in absence of a true elemental magnetic monopole, creation of electron vortices and studying electrodynamics in presence of a monopole-like field in a solid state environment. |
format |
Article in Journal/Newspaper |
author |
Neeti Keswani Ricardo J. C. Lopes Yoshikata Nakajima Ranveer Singh Neha Chauhan Tapobrata Som D. Sakthi Kumar Afranio R. Pereira Pintu Das |
author_facet |
Neeti Keswani Ricardo J. C. Lopes Yoshikata Nakajima Ranveer Singh Neha Chauhan Tapobrata Som D. Sakthi Kumar Afranio R. Pereira Pintu Das |
author_sort |
Neeti Keswani |
title |
Controlled creation and annihilation of isolated robust emergent magnetic monopole like charged vertices in square artificial spin ice |
title_short |
Controlled creation and annihilation of isolated robust emergent magnetic monopole like charged vertices in square artificial spin ice |
title_full |
Controlled creation and annihilation of isolated robust emergent magnetic monopole like charged vertices in square artificial spin ice |
title_fullStr |
Controlled creation and annihilation of isolated robust emergent magnetic monopole like charged vertices in square artificial spin ice |
title_full_unstemmed |
Controlled creation and annihilation of isolated robust emergent magnetic monopole like charged vertices in square artificial spin ice |
title_sort |
controlled creation and annihilation of isolated robust emergent magnetic monopole like charged vertices in square artificial spin ice |
publisher |
Nature Portfolio |
publishDate |
2021 |
url |
https://doi.org/10.1038/s41598-021-92877-7 https://doaj.org/article/747ca22ec28e4473aea49cf64c6a28bd |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021) |
op_relation |
https://doi.org/10.1038/s41598-021-92877-7 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-021-92877-7 2045-2322 https://doaj.org/article/747ca22ec28e4473aea49cf64c6a28bd |
op_doi |
https://doi.org/10.1038/s41598-021-92877-7 |
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Scientific Reports |
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11 |
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1 |
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1766202116300341248 |