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Decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet
An ongoing challenge in the study of quantum materials, is to reveal and explain collective quantum effects in spin systems where interactions between different modes types are important. Here we approach this problem through a combined experimental and theoretical study of interacting transverse an...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8429660/ https://www.ncbi.nlm.nih.gov/pubmed/34504075 http://dx.doi.org/10.1038/s41467-021-25591-7 |
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author | Do, Seung-Hwan Zhang, Hao Williams, Travis J. Hong, Tao Garlea, V. Ovidiu Rodriguez-Rivera, J. A. Jang, Tae-Hwan Cheong, Sang-Wook Park, Jae-Hoon Batista, Cristian D. Christianson, Andrew D. |
author_facet | Do, Seung-Hwan Zhang, Hao Williams, Travis J. Hong, Tao Garlea, V. Ovidiu Rodriguez-Rivera, J. A. Jang, Tae-Hwan Cheong, Sang-Wook Park, Jae-Hoon Batista, Cristian D. Christianson, Andrew D. |
author_sort | Do, Seung-Hwan |
collection | PubMed |
description | An ongoing challenge in the study of quantum materials, is to reveal and explain collective quantum effects in spin systems where interactions between different modes types are important. Here we approach this problem through a combined experimental and theoretical study of interacting transverse and longitudinal modes in an easy-plane quantum magnet near a continuous quantum phase transition. Our inelastic neutron scattering measurements of Ba(2)FeSi(2)O(7) reveal the emergence, decay, and renormalization of a longitudinal mode throughout the Brillouin zone. The decay of the longitudinal mode is particularly pronounced at the zone center. To account for the many-body effects of the interacting low-energy modes in anisotropic magnets, we generalize the standard spin-wave theory. The measured mode decay and renormalization is reproduced by including all one-loop corrections. The theoretical framework developed here is broadly applicable to quantum magnets with more than one type of low energy mode. |
format | Online Article Text |
id | pubmed-8429660 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-84296602021-09-24 Decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet Do, Seung-Hwan Zhang, Hao Williams, Travis J. Hong, Tao Garlea, V. Ovidiu Rodriguez-Rivera, J. A. Jang, Tae-Hwan Cheong, Sang-Wook Park, Jae-Hoon Batista, Cristian D. Christianson, Andrew D. Nat Commun Article An ongoing challenge in the study of quantum materials, is to reveal and explain collective quantum effects in spin systems where interactions between different modes types are important. Here we approach this problem through a combined experimental and theoretical study of interacting transverse and longitudinal modes in an easy-plane quantum magnet near a continuous quantum phase transition. Our inelastic neutron scattering measurements of Ba(2)FeSi(2)O(7) reveal the emergence, decay, and renormalization of a longitudinal mode throughout the Brillouin zone. The decay of the longitudinal mode is particularly pronounced at the zone center. To account for the many-body effects of the interacting low-energy modes in anisotropic magnets, we generalize the standard spin-wave theory. The measured mode decay and renormalization is reproduced by including all one-loop corrections. The theoretical framework developed here is broadly applicable to quantum magnets with more than one type of low energy mode. Nature Publishing Group UK 2021-09-09 /pmc/articles/PMC8429660/ /pubmed/34504075 http://dx.doi.org/10.1038/s41467-021-25591-7 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Do, Seung-Hwan Zhang, Hao Williams, Travis J. Hong, Tao Garlea, V. Ovidiu Rodriguez-Rivera, J. A. Jang, Tae-Hwan Cheong, Sang-Wook Park, Jae-Hoon Batista, Cristian D. Christianson, Andrew D. Decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet |
title | Decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet |
title_full | Decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet |
title_fullStr | Decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet |
title_full_unstemmed | Decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet |
title_short | Decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet |
title_sort | decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8429660/ https://www.ncbi.nlm.nih.gov/pubmed/34504075 http://dx.doi.org/10.1038/s41467-021-25591-7 |
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