Direct evidence for dominant bond-directional interactions in a honeycomb lattice iridate Na2IrO3

@article{ ISI:000355552200010,
Author = {Chun, Sae Hwan and Kim, Jong-Woo and Kim, Jungho and Zheng, H. and
   Stoumpos, Constantinos C. and Malliakas, C. D. and Mitchell, J. F. and
   Mehlawat, Kavita and Singh, Yogesh and Choi, Y. and Gog, T. and Al-Zein,
   A. and Sala, M. Moretti and Krisch, M. and Chaloupka, J. and Jackeli, G.
   and Khaliullin, G. and Kim, B. J.},
Title = {{Direct evidence for dominant bond-directional interactions in a
   honeycomb lattice iridate Na2IrO3}},
Journal = {{NATURE PHYSICS}},
Year = {{2015}},
Volume = {{11}},
Number = {{6}},
Pages = {{462-U183}},
Month = {{JUN}},
Abstract = {{Heisenberg interactions are ubiquitous in magnetic materials and play a
   central role in modelling and designing quantum magnets.
   Bond-directional interactions(1-3) offer a novel alternative to
   Heisenberg exchange and provide the building blocks of the Kitaev
   model(4), which has a quantum spin liquid as its exact ground state.
   Honeycomb iridates, A(2)IrO(3) (A = Na, Li), offer potential
   realizations of the Kitaev magnetic exchange coupling, and their
   reported magnetic behaviour may be interpreted within the Kitaev
   framework. However, the extent of their relevance to the Kitaev model
   remains unclear, as evidence for bond-directional interactions has so
   far been indirect. Herewe present direct evidence for dominant
   bond-directional interactions in antiferromagnetic Na2IrO3 and show that
   they lead to strong magnetic frustration. Diffuse magnetic X-ray
   scattering reveals broken spin-rotational symmetry even above the Neel
   temperature, with the three spin components exhibiting short-range
   correlations along distinct crystallographic directions. This spin- and
   real-space entanglement directly uncovers the bond-directional nature of
   these interactions, thus providing a direct connection between honeycomb
   iridates and Kitaev physics.}},
Publisher = {{NATURE PUBLISHING GROUP}},
Address = {{MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Kim, BJ (Corresponding Author), Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany.
   Chun, Sae Hwan; Zheng, H.; Stoumpos, Constantinos C.; Malliakas, C. D.; Mitchell, J. F.; Krisch, M., Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   Kim, Jong-Woo; Kim, Jungho; Choi, Y.; Gog, T., Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   Mehlawat, Kavita; Singh, Yogesh, Indian Inst Sci Educ & Res IISER Mohali, Mohali 140306, India.
   Al-Zein, A.; Sala, M. Moretti; Krisch, M., European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   Chaloupka, J., Masaryk Univ, Cent European Inst Technol, CS-61137 Brno, Czech Republic.
   Jackeli, G.; Khaliullin, G.; Kim, B. J., Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany.
   Jackeli, G., Univ Stuttgart, Inst Funct Matter & Quantum Technol, D-70569 Stuttgart, Germany.}},
DOI = {{10.1038/NPHYS3322}},
ISSN = {{1745-2473}},
EISSN = {{1745-2481}},
Keywords-Plus = {{KITAEV INTERACTIONS; ORDER}},
Research-Areas = {{Physics}},
Web-of-Science-Categories  = {{Physics, Multidisciplinary}},
Author-Email = {{bjkim@fkf.mpg.de}},
ResearcherID-Numbers = {{Moretti, Marco/AAF-9255-2019
   Sala, Marco Moretti/H-1034-2014
   Chaloupka, Jiri/I-3636-2014
   Stoumpos, Constantinos C./P-6677-2016
   singh, yogesh/F-7160-2016
   Singh, Yogesh/AAD-9310-2019
   Jackeli, George/A-8637-2013
   Krisch, Michael H/U-5662-2018
   Zein, Ali Al/F-4393-2019
   }},
ORCID-Numbers = {{Moretti, Marco/0000-0002-9744-9976
   Sala, Marco Moretti/0000-0002-9744-9976
   Stoumpos, Constantinos C./0000-0001-8396-9578
   Jackeli, George/0000-0002-1286-8718
   Krisch, Michael H/0000-0001-7423-1715
   Chaloupka, Jiri/0000-0001-8898-0442
   Choi, Yongseong/0000-0001-5790-3129
   Kim, Jong-Woo/0000-0001-9641-2947}},
Funding-Acknowledgement = {{US Department of Energy, Office of Science, Basic Energy Sciences,
   Materials Science and Engineering DivisionUnited States Department of
   Energy (DOE); US DOEUnited States Department of Energy (DOE)
   {[}DE-AC02-06CH11357]; UGC-CSIR, India; DST, IndiaDepartment of Science
   & Technology (India) {[}SR/S2/RJN-76/2010]; DSTDepartment of Science &
   Technology (India) {[}SB/S2/CMP-001/2013]; ERDF under project CEITEC
   {[}CZ.1.05/1.1.00/02.0068]; EC 7th Framework Programme {[}286154/SYLICA]}},
Funding-Text = {{Work in the Materials Science Division of Argonne National Laboratory
   (sample preparation, characterization, and contributions to data
   analysis) was supported by the US Department of Energy, Office of
   Science, Basic Energy Sciences, Materials Science and Engineering
   Division. Use of the Advanced Photon Source, an Office of Science User
   Facility operated for the US Department of Energy (DOE) Office of
   Science by Argonne National Laboratory, was supported by the US DOE
   under Contract No. DE-AC02-06CH11357. K.M. acknowledges support from
   UGC-CSIR, India. Y.S. acknowledges DST, India for support through
   Ramanujan Grant #SR/S2/RJN-76/2010 and through DST grant
   #SB/S2/CMP-001/2013. J.C. was supported by ERDF under project CEITEC
   (CZ.1.05/1.1.00/02.0068) and EC 7th Framework Programme (286154/SYLICA).}},
Number-of-Cited-References = {{33}},
Times-Cited = {{199}},
Usage-Count-Last-180-days = {{3}},
Usage-Count-Since-2013 = {{129}},
Journal-ISO = {{Nat. Phys.}},
Doc-Delivery-Number = {{CJ5TK}},
Unique-ID = {{ISI:000355552200010}},
OA = {{Bronze}},
ESI-Highly-Cited-Paper = {{Y}},
ESI-Hot-Paper = {{N}},
DA = {{2020-12-22}},
}