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Elementary excitation in the spin-stripe phase in quantum chains

Pregelj, Matej; Zorko, Andrej; Gomilšek, Matjaž; Klanjšek, Martin; Zaharko, Oksana; White, Jonathan S.; Luetkens, Hubertus; Coomer, Fiona; Ivek, Tomislav; Rivas Góngora, David; Berger, Helmuth; Arčon, Denis

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Authors

Matej Pregelj

Andrej Zorko

Matjaž Gomilšek

Martin Klanjšek

Oksana Zaharko

Jonathan S. White

Hubertus Luetkens

Fiona Coomer

Tomislav Ivek

David Rivas Góngora

Helmuth Berger

Denis Arčon



Abstract

Elementary excitations in condensed matter capture the complex many-body dynamics of interacting basic entities in a simple quasiparticle picture. In magnetic systems the most established quasiparticles are magnons, collective excitations that reside in ordered spin structures, and spinons, their fractional counterparts that emerge in disordered, yet correlated spin states. Here we report on the discovery of elementary excitation inherent to spin-stripe order that represents a bound state of two phason quasiparticles, resulting in a wiggling-like motion of the magnetic moments. We observe these excitations, which we dub “wigglons”, in the frustrated zigzag spin-1/2 chain compound β-TeVO4, where they give rise to unusual low-frequency spin dynamics in the spin-stripe phase. This result provides insights into the stripe physics of strongly-correlated electron systems.

Citation

Pregelj, M., Zorko, A., Gomilšek, M., Klanjšek, M., Zaharko, O., White, J. S., …Arčon, D. (2019). Elementary excitation in the spin-stripe phase in quantum chains. npj Quantum Materials, 4(1), Article 22. https://doi.org/10.1038/s41535-019-0160-5

Journal Article Type Article
Acceptance Date Apr 9, 2019
Online Publication Date May 3, 2019
Publication Date May 3, 2019
Deposit Date May 22, 2019
Publicly Available Date Mar 29, 2024
Journal npj quantum materials.
Print ISSN 2397-4648
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 4
Issue 1
Article Number 22
DOI https://doi.org/10.1038/s41535-019-0160-5
Related Public URLs https://arxiv.org/abs/1905.02079

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http://creativecommons.org/licenses/by/4.0/

Copyright Statement
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/.





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