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dc.contributor.authorLegg, H. F.
dc.contributor.authorBraunecker, Bernd
dc.identifier.citationLegg , H F & Braunecker , B 2019 , ' Spin liquid mediated RKKY interaction ' , Scientific Reports , vol. 9 , 17697 , pp. 1-12 .
dc.identifier.otherPURE: 262527759
dc.identifier.otherPURE UUID: b7e4353b-8cc8-4af3-977b-3a221e13d40d
dc.identifier.otherORCID: /0000-0002-7077-8825/work/65345422
dc.identifier.otherScopus: 85075722644
dc.identifier.otherWOS: 000499180900001
dc.descriptionFunding: DFG under CRC 1238 and Bonn-Cologne Graduate School of Physics and Astronomy (BCGS).en
dc.description.abstractWe propose an RKKY-type interaction that is mediated by a spin liquid. If a spin liquid exists such an interaction could leave a fingerprint by ordering underlying localised moments such as nuclear spins. This interaction has a unique phenomenology that is distinct from the RKKY interaction found in fermionic systems; most notably the lack of a Fermi surface and absence of the requirement for itinerant electrons, since most spin liquids are insulators. We demonstrate that the interaction is predominately shaped by the lattice symmetries of the underlying spin liquid. As a working example we investigate the possible ordering of nuclear spins that interact through an underlying lattice of the two-dimensional spin-1/2 kagome antiferromagnet (KHAF), although the treatment remains general and can be extended to other spin liquids and dimensions. We find that several different nuclear spin orderings minimise the RKKY-type energy induced by the KHAF but are unstable due to a zero-energy flat magnon band in linear spin-wave theory. Despite this we show that a small magnetic field is able to gap out this magnon spectrum resulting in an intricate nuclear magnetism.
dc.relation.ispartofScientific Reportsen
dc.rights© The Author(s) 2019. 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
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleSpin liquid mediated RKKY interactionen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.description.statusPeer revieweden

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