Properties of spin-1/2 triangular-lattice antiferromagnets CuY2Ge2O8 and CuLa2Ge2O8

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dc.contributor.authorCho, Hen_AU
dc.contributor.authorKratochvílová, Men_AU
dc.contributor.authorSim, Hen_AU
dc.contributor.authorChoi, KYen_AU
dc.contributor.authorKim, CHen_AU
dc.contributor.authorPaulsen, Cen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorPeets, DCen_AU
dc.contributor.authorJo, Yen_AU
dc.contributor.authorLee, Sen_AU
dc.contributor.authorNoda, Yen_AU
dc.contributor.authorLawler, MJen_AU
dc.contributor.authorPark, JGen_AU
dc.date.accessioned2021-06-28T21:23:11Zen_AU
dc.date.available2021-06-28T21:23:11Zen_AU
dc.date.issued2017-04-05en_AU
dc.date.statistics2021-06-17en_AU
dc.description.abstractWe found new two-dimensional (2D) quantum (S=1/2) antiferromagnetic systems: CuRE2Ge2O8 (RE=Y and La). According to our analysis of high-resolution x-ray and neutron diffraction experiments, the Cu network of CuRE2Ge2O8 (RE=Y and La) exhibits a 2D triangular lattice linked via weak bonds along the perpendicular b axis. Our bulk characterizations from 0.08 to 400 K show that they undergo a long-range order at 0.51(1) and 1.09(4) K for the Y and La systems, respectively. Interestingly, they also exhibit field induced phase transitions. For theoretical understanding, we carried out the density functional theory (DFT) band calculations to find that they are typical charge-transfer-type insulators with a gap of Eg≅2eV. Taken together, our observations make CuRE2Ge2O8 (RE=Y and La) additional examples of low-dimensional quantum spin triangular antiferromagnets with the low-temperature magnetic ordering. ©2017 American Physical Societyen_AU
dc.identifier.articlenumber144404en_AU
dc.identifier.citationCho, H., Kratochvílová, M., Sim, H., Choi, K.-Y., Kim, C. H., Paulsen, C., Avdeev, M., Peets, D. C., Jo, Y., Lee, S., Noda, Y., Lawler, M. J., & Park, J.-G. (2017). Properties of spin-1/2 triangular-lattice antiferromagnets CuY2Ge2O8 and CuLa2Ge2O8. Physical Review B, 95(14), 144404. doi:10.1103/PhysRevB.95.144404en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.issue14en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttps://doi.org/10.1103/PhysRevB.95.144404en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10920en_AU
dc.identifier.volume95en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectMonocrystalsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectSpecific heaten_AU
dc.subjectPhase transformationsen_AU
dc.titleProperties of spin-1/2 triangular-lattice antiferromagnets CuY2Ge2O8 and CuLa2Ge2O8en_AU
dc.typeJournal Articleen_AU
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