Gibbs, A.S., Yamamoto, A., Yaresko, A.N., Knight, K.S., Yasuoka, H., Majumder, M., Baenitz, M., Saines, P.J., Hester, J.R., Hashizume, D., and others. (2017) \(S = {1 \over 2}\) quantum critical spin ladders produced by orbital ordering in \(Ba_2CuTeO_6\). Physical Review B, 95 (10). Article Number 104428. ISSN 2469-9950. E-ISSN 2469-9969. (doi:10.1103/PhysRevB.95.104428) (KAR id:61567)
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Official URL: https://doi.org/10.1103/PhysRevB.95.104428 |
Abstract
The ordered hexagonal perovskite \(Ba_2CuTeO_6\) hosts weakly coupled \(S = {1 \over 2}\) spin ladders produced by an orbital ordering of \(Cu^{2+}\). The magnetic susceptibility χ(T) of \(Ba_2CuTeO_6\) is well described by that expected for isolated spin ladders with exchange coupling of \(J≈86K\) but shows a deviation from the expected thermally activated behavior at low temperatures below \(T^∗≈25K\). An anomaly in χ(T), indicative of magnetic ordering, is observed at \(T_{mag}=16K\). No clear signature of long-range ordering, however, is captured so far in NMR \(1/T_1\), specific heat or neutron diffraction measurements at and below \(T_{mag}\). The marginal magnetic transition, indicative of strong quantum fluctuations, is evidence that \(Ba_2CuTeO_6\) is in very close proximity to a quantum critical point between magnetically ordered and spin-gapped phases controlled by interladder couplings.
Item Type: | Article |
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DOI/Identification number: | 10.1103/PhysRevB.95.104428 |
Uncontrolled keywords: | antiferromagnetism; perovskite; nuclear magnetic resonance; specific heat measurements; spin ladders; susceptibility measurements |
Subjects: | Q Science |
Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
Depositing User: | Paul Saines |
Date Deposited: | 27 Apr 2017 08:01 UTC |
Last Modified: | 09 Dec 2022 03:13 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/61567 (The current URI for this page, for reference purposes) |
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