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Nature Of Spin Excitations In The One-third Magnetization Plateau Phase Of Ba3cosb2o9

Title: The Nature Of Spin Excitations In The One-third Magnetization Plateau Phase Of Ba3cosb2o9.
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Name(s): Kamiya, Y., author
Ge, L., author
Hong, Tao, author
Qiu, Y., author
Quintero-Castro, D. L., author
Lu, Z., author
Cao, H. B., author
Matsuda, M., author
Choi, E. S., author
Batista, C. D., author
Mourigal, M., author
Zhou, N. D., author
Ma, J., author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-07-10
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Magnetization plateaus in quantum magnets-where bosonic quasiparticles crystallize into emergent spin superlattices-are spectacular yet simple examples of collective quantum phenomena escaping classical description. While magnetization plateaus have been observed in a number of spin-1/2 antiferromagnets, the description of their magnetic excitations remains an open theoretical and experimental challenge. Here, we investigate the dynamical properties of the triangular-lattice spin-1/2 antiferromagnet Ba3CoSb2O9 in its one-third magnetization plateau phase using a combination of nonlinear spin-wave theory and neutron scattering measurements. The agreement between our theoretical treatment and the experimental data demonstrates that magnons behave semiclassically in the plateau in spite of the purely quantum origin of the underlying magnetic structure. This allows for a quantitative determination of Ba3CoSb2O9 exchange parameters. We discuss the implication of our results to the deviations from semiclassical behavior observed in zero-field spin dynamics of the same material and conclude they must have an intrinsic origin.
Identifier: FSU_libsubv1_wos_000438031000004 (IID), 10.1038/s41467-018-04914-1 (DOI)
Keywords: field, antiferromagnet, triangular lattice, disorder, quantum, bose-einstein condensation, square-lattice
Publication Note: The publisher’s version of record is available at https://doi.org/10.1038/s41467-018-04914-1
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000438031000004
Owner Institution: FSU
Is Part Of: Nature Communications.
2041-1723
Issue: vol. 9

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Kamiya, Y., Ge, L., Hong, T., Qiu, Y., Quintero-Castro, D. L., Lu, Z., … Ma, J. (2018). The Nature Of Spin Excitations In The One-third Magnetization Plateau Phase Of Ba3cosb2o9. Nature Communications. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000438031000004