Low-energy excitations and ground-state selection in the quantum breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11

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dc.contributor.authorHaku, Ten_AU
dc.contributor.authorKimura, Ken_AU
dc.contributor.authorMatsumoto, Yen_AU
dc.contributor.authorSoda, Men_AU
dc.contributor.authorSera, Men_AU
dc.contributor.authorYu, DHen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorTakeuchi, Ten_AU
dc.contributor.authorNakatsuji, Sen_AU
dc.contributor.authorKono, Yen_AU
dc.contributor.authorSakakibara, Ten_AU
dc.contributor.authorChang, LJen_AU
dc.contributor.authorMasuda, Ten_AU
dc.date.accessioned2025-03-11T08:10:12Zen_AU
dc.date.available2025-03-11T08:10:12Zen_AU
dc.date.issued2016-06-01en_AU
dc.date.statistics2024-11-26en_AU
dc.description.abstractWe study low-energy excitations in the quantum breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11 by a combination of inelastic neutron scattering (INS) and thermodynamical property measurements. The INS spectra are quantitatively explained by spin-12 single-tetrahedron model having XXZ anisotropy and Dzyaloshinskii-Moriya interactions. This model has a twofold degeneracy of the lowest-energy state per tetrahedron and well reproduces the magnetization curve at 0.5 K and heat capacity above 1.5 K. At lower temperatures, however, we observe a broad maximum in the heat capacity around 63 mK, demonstrating that a unique quantum ground state is selected due to extra perturbations with an energy scale smaller than the instrumental resolution of INS. ©2024 American Physical Society. All rights reserved.en_AU
dc.identifier.articlenumber220407en_AU
dc.identifier.citationHaku, T., Kimura, K., Matsumoto, Y., Soda, M., Sera, M., Yu, D., Mole, R. A., Takeuchi, T., Nakatsuji, S., Kono, Y., Sakakibara, T., Chang, L. J., & Masuda, T. (2016). Low-energy excitations and ground-state selection in the quantum breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11. Physical Review B, 93(22), 220407. doi:10.1103/PhysRevB.93.220407en_AU
dc.identifier.issn2469-9950en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.issue22en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttps://doi.org/10.1103/physrevb.93.220407en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16048en_AU
dc.identifier.volume93en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Society (APS)en_AU
dc.subjectPyrochloreen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectGround statesen_AU
dc.subjectZincen_AU
dc.subjectYtterbiumen_AU
dc.subjectBariumen_AU
dc.subjectNeutron diffractionen_AU
dc.titleLow-energy excitations and ground-state selection in the quantum breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11en_AU
dc.typeJournal Articleen_AU
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