Mustonen, OHJ;
Mutch, HM;
Walker, HC;
Baker, PJ;
Coomer, FC;
Perry, RS;
Pughe, C;
... Cussen, EJ; + view all
(2022)
Valence bond glass state in the 4d1 fcc antiferromagnet Ba2LuMoO6.
npj Quantum Materials
, 7
, Article 74. 10.1038/s41535-022-00480-4.
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Abstract
B-site ordered 4d1 and 5d1 double perovskites have a number of potential exotic ground states including multipolar order, quantum spin liquids and valence bond glass states. These arise from the complex interactions of spin-orbital entangled Jeff = 3/2 pseudospins on the geometrically frustrated fcc lattice. The 4d1 Mo5+ perovskite Ba2YMoO6 has been suggested to have a valence bond glass ground state. Here we report on the low temperature properties of powder samples of isostructural Ba2LuMoO6: the only other known cubic 4d1 perovskite with one magnetic cation. Our muon spectroscopy experiments show that magnetism in this material remains dynamic down to 60 mK without any spin freezing or magnetic order. A singlet-triplet excitation with a gap of Δ = 28 meV is observed in inelastic neutron scattering. These results are interpreted as a disordered valence bond glass ground state similar to Ba2YMoO6. Our results highlight the differences of the 4d1 double perovskites in comparison to cubic 5d1 analogues, which have both magnetic and multipolar order.
| Type: | Article |
|---|---|
| Title: | Valence bond glass state in the 4d1 fcc antiferromagnet Ba2LuMoO6 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41535-022-00480-4 |
| Publisher version: | https://doi.org/10.1038/s41535-022-00480-4 |
| Language: | English |
| Additional information: | © The Author(s) 2022. 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/. |
| Keywords: | Science & Technology, Technology, Physical Sciences, Materials Science, Multidisciplinary, Quantum Science & Technology, Physics, Applied, Physics, Condensed Matter, Materials Science, Physics, MAGNETIC-PROPERTIES, NEUTRON-SCATTERING, DOUBLE PEROVSKITES, MU-SR, VISUALIZATION, CRYSTAL |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10153578 |
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