Three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO2

Here we report on the formation of a three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO_{2}, where the single-ion, uniaxial anisotropy inherent to the Mn^{3+} ions in this material provides a binding mechanism capable of stabilizing higher order magnon bound states. While...

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Main Authors: Dally, Rebecca L., Heng, Alvin J. R., Keselman, Anna, Bordelon, Mitchell M., Stone, Matthew B., Balents, Leon, Wilson, Stephen D.
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/145025
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1450252023-02-28T19:54:19Z Three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO2 Dally, Rebecca L. Heng, Alvin J. R. Keselman, Anna Bordelon, Mitchell M. Stone, Matthew B. Balents, Leon Wilson, Stephen D. School of Physical and Mathematical Sciences Physics - Strongly Correlated Electrons Physics - Strongly Correlated Electrons Science::Physics Antiferromagnet Bound State Here we report on the formation of a three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO_{2}, where the single-ion, uniaxial anisotropy inherent to the Mn^{3+} ions in this material provides a binding mechanism capable of stabilizing higher order magnon bound states. While such states have long remained elusive in studies of antiferromagnetic chains, neutron scattering data presented here demonstrate that higher order n>2 composite magnons exist, and, specifically, that a weak three-magnon bound state is detected below the antiferromagnetic ordering transition of NaMnO_{2}. We corroborate our findings with exact numerical simulations of a one-dimensional Heisenberg chain with easy-axis anisotropy using matrix-product state techniques, finding a good quantitative agreement with the experiment. These results establish α-NaMnO_{2} as a unique platform for exploring the dynamics of composite magnon states inherent to a classical antiferromagnetic spin chain with Ising-like single ion anisotropy. Published version 2020-12-08T09:22:10Z 2020-12-08T09:22:10Z 2020 Journal Article Dally, R. L., Heng, A. J. R., Keselman, A., Bordelon, M. M., Stone, M. B., Balents, L., & Wilson, S. D. (2020). Three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO2. Physical Review Letters, 124(19), 197203-. doi:10.1103/PhysRevLett.124.197203 0031-9007 https://hdl.handle.net/10356/145025 10.1103/PhysRevLett.124.197203 32469556 19 124 en Physical Review Letters © 2020 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Physics - Strongly Correlated Electrons
Physics - Strongly Correlated Electrons
Science::Physics
Antiferromagnet
Bound State
spellingShingle Physics - Strongly Correlated Electrons
Physics - Strongly Correlated Electrons
Science::Physics
Antiferromagnet
Bound State
Dally, Rebecca L.
Heng, Alvin J. R.
Keselman, Anna
Bordelon, Mitchell M.
Stone, Matthew B.
Balents, Leon
Wilson, Stephen D.
Three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO2
description Here we report on the formation of a three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO_{2}, where the single-ion, uniaxial anisotropy inherent to the Mn^{3+} ions in this material provides a binding mechanism capable of stabilizing higher order magnon bound states. While such states have long remained elusive in studies of antiferromagnetic chains, neutron scattering data presented here demonstrate that higher order n>2 composite magnons exist, and, specifically, that a weak three-magnon bound state is detected below the antiferromagnetic ordering transition of NaMnO_{2}. We corroborate our findings with exact numerical simulations of a one-dimensional Heisenberg chain with easy-axis anisotropy using matrix-product state techniques, finding a good quantitative agreement with the experiment. These results establish α-NaMnO_{2} as a unique platform for exploring the dynamics of composite magnon states inherent to a classical antiferromagnetic spin chain with Ising-like single ion anisotropy.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Dally, Rebecca L.
Heng, Alvin J. R.
Keselman, Anna
Bordelon, Mitchell M.
Stone, Matthew B.
Balents, Leon
Wilson, Stephen D.
format Article
author Dally, Rebecca L.
Heng, Alvin J. R.
Keselman, Anna
Bordelon, Mitchell M.
Stone, Matthew B.
Balents, Leon
Wilson, Stephen D.
author_sort Dally, Rebecca L.
title Three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO2
title_short Three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO2
title_full Three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO2
title_fullStr Three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO2
title_full_unstemmed Three-magnon bound state in the quasi-one-dimensional antiferromagnet α-NaMnO2
title_sort three-magnon bound state in the quasi-one-dimensional antiferromagnet α-namno2
publishDate 2020
url https://hdl.handle.net/10356/145025
_version_ 1759855888448880640