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  S=1/2 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6

Gibbs, A. S., Yamamoto, A., Yaresko, A. N., Knight, K. S., Yasuoka, H., Majumder, M., et al. (2017). S=1/2 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6. Physical Review B, 95(10): 104428, pp. 1-6. doi:10.1103/PhysRevB.95.104428.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-3CEE-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-CCBC-5
Genre: Journal Article

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 Creators:
Gibbs , A. S.1, Author
Yamamoto, A.1, Author
Yaresko, A. N.1, Author
Knight, K. S.1, Author
Yasuoka, H.2, Author              
Majumder, M.3, Author              
Baenitz, M.4, Author              
Saines, P. J.1, Author
Hester, J. R.1, Author
Hashizume, D.1, Author
Kondo, A.1, Author
Kindo, K.1, Author
Takagi, H.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
3Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
4Michael Baenitz, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863471              

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 Abstract: The ordered hexagonal perovskite Ba2CuTeO6 hosts weakly coupled S = 1/2 spin ladders produced by an orbital ordering of Cu2+. The magnetic susceptibility chi(T) of Ba2CuTeO6 is well described by that expected for isolated spin ladders with exchange coupling of J approximate to 86 K but shows a deviation from the expected thermally activated behavior at low temperatures below T* approximate to 25 K. An anomaly in chi(T), indicative of magnetic ordering, is observed at T-mag = 16 K. 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 Tmag. The marginal magnetic transition, indicative of strong quantum fluctuations, is evidence that Ba2CuTeO6 is in very close proximity to a quantum critical point between magnetically ordered and spin-gapped phases controlled by interladder couplings.

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Language(s): eng - English
 Dates: 2017-03-212017-03-21
 Publication Status: Published in print
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 95 (10) Sequence Number: 104428 Start / End Page: 1 - 6 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008