Dominant Kitaev interactions in the honeycomb materials Na3Co2SbO6 and Na2Co2TeO6

Simple item page
dc.contributor.authorSanders, ALen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorLiu, Jen_AU
dc.contributor.authorBrown, AJen_AU
dc.contributor.authorYu, DHen_AU
dc.contributor.authorLing, CDen_AU
dc.contributor.authorRachel, Sen_AU
dc.date.accessioned2025-03-11T08:33:41Zen_AU
dc.date.available2025-03-11T08:33:41Zen_AU
dc.date.issued2022-07-01en_AU
dc.date.statistics2024-11-27en_AU
dc.description.abstractCobaltates with 3d based layered honeycomb structure were recently proposed as Kitaev magnets and putative candidates to host the long-sought Kitaev spin liquid. Here we present inelastic neutron scattering results down to 50 mK for powder samples of Na3Co2SbO6 and Na2Co2TeO6, with high resolution in regions of low momentum and energy transfers. We compare the experimental data below the antiferromagnetic zigzag ordering temperature with dynamical structure factors obtained within spin wave theory. We search the wide parameter range of a K-J1-Γ-Γ′-J3 spin 1/2 model and identify the best fits to constant momentum cuts of the inelastic neutron data. The powder average limits our ability to uniquely select a best-fit model, but we find that the experimental data is matched equally well by two classes of parameters: one with a dominant K<0, |K/J1|∼5...25, and another with K>0, |K/J1|∼1. We show that these classes are equivalent under the exact self-duality transformation identified by Chaloupka and Khalliulin [Phys. Rev. B 92, 024413 (2015)10.1103/PhysRevB.92.024413]. This model symmetry unifies a number of previous parameter estimates. Though the two cases are indistinguishable by our experiment, there is evidence in favor of the K<0 case. A purely isotropic Heisenberg model is incompatible with our results. ©2024 American Physical Society. All rights reserved.en_AU
dc.identifier.articlenumber014413en_AU
dc.identifier.citationSanders, A. L., Mole, R. A., Liu, J., Brown, A. J., Yu, D., Ling, C. D., & Rachel, S. (2022). Dominant Kitaev interactions in the honeycomb materials Na3 Co2 SbO6 and Na2 Co2 TeO6. Physical Review B, 106(1), 014413. doi: 10.1103/PhysRevB.106.014413en_AU
dc.identifier.issn2469-9950en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttps://doi.org/10.1103/physrevb.106.014413en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16049en_AU
dc.identifier.volume106en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Society (APS)en_AU
dc.subjectHoneycomb structuresen_AU
dc.subjectMaterialsen_AU
dc.subjectMagnetsen_AU
dc.subjectNeutronsen_AU
dc.subjectHeisenberg modelen_AU
dc.subjectTelluriumen_AU
dc.subjectAntimonyen_AU
dc.subjectCobalten_AU
dc.titleDominant Kitaev interactions in the honeycomb materials Na3Co2SbO6 and Na2Co2TeO6en_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.66 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles