CHUN, Sae Hwan, Jong-Woo KIM, Jungho KIM, H. ZHENG, Constantinos C STOUMPOS, C.D. MALLIAKAS, J.F. MITCHELL, Kavita MEHLAWAT, Yogesh SINGH, Y. CHOI, T. GOG, A. AL-ZEIN, M. Moretti SALA, M. KRISCH, Jiří CHALOUPKA, George JACKELI, Giniyat KHALIULLIN a B.J. KIM. Direct evidence for dominant bond-directional interactions in a honeycomb lattice iridate Na2IrO3. Nature Physics. London: Nature Publishing Group, 2015, roč. 11, č. 6, s. 462-467. ISSN 1745-2473. Dostupné z: https://dx.doi.org/10.1038/NPHYS3322. |
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@article{1331271, author = {Chun, Sae Hwan and Kim, JongandWoo 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 AlandZein, A. and Sala, M. Moretti and Krisch, M. and Chaloupka, Jiří and Jackeli, George and Khaliullin, Giniyat and Kim, B.J.}, article_location = {London}, article_number = {6}, doi = {http://dx.doi.org/10.1038/NPHYS3322}, keywords = {spin interactions; frustrated magnetism; iridates; spin models}, language = {eng}, issn = {1745-2473}, journal = {Nature Physics}, title = {Direct evidence for dominant bond-directional interactions in a honeycomb lattice iridate Na2IrO3}, url = {http://www.nature.com/nphys/journal/v11/n6/full/nphys3322.html}, volume = {11}, year = {2015} }
TY - JOUR ID - 1331271 AU - Chun, Sae Hwan - Kim, Jong-Woo - Kim, Jungho - Zheng, H. - Stoumpos, Constantinos C - Malliakas, C.D. - Mitchell, J.F. - Mehlawat, Kavita - Singh, Yogesh - Choi, Y. - Gog, T. - Al-Zein, A. - Sala, M. Moretti - Krisch, M. - Chaloupka, Jiří - Jackeli, George - Khaliullin, Giniyat - Kim, B.J. PY - 2015 TI - Direct evidence for dominant bond-directional interactions in a honeycomb lattice iridate Na2IrO3 JF - Nature Physics VL - 11 IS - 6 SP - 462-467 EP - 462-467 PB - Nature Publishing Group SN - 17452473 KW - spin interactions KW - frustrated magnetism KW - iridates KW - spin models UR - http://www.nature.com/nphys/journal/v11/n6/full/nphys3322.html L2 - http://www.nature.com/nphys/journal/v11/n6/full/nphys3322.html N2 - Heisenberg interactions are ubiquitous in magnetic materials and play a central role in modelling and designing quantum magnets. Bond-directional interactions offer a novel alternative to Heisenberg exchange and provide the building blocks of the Kitaev model, which has a quantum spin liquid as its exact ground state. Honeycomb iridates, A2IrO3 (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. ER -
CHUN, Sae Hwan, Jong-Woo KIM, Jungho KIM, H. ZHENG, Constantinos C STOUMPOS, C.D. MALLIAKAS, J.F. MITCHELL, Kavita MEHLAWAT, Yogesh SINGH, Y. CHOI, T. GOG, A. AL-ZEIN, M. Moretti SALA, M. KRISCH, Jiří CHALOUPKA, George JACKELI, Giniyat KHALIULLIN a B.J. KIM. Direct evidence for dominant bond-directional interactions in a honeycomb lattice iridate Na2IrO3. \textit{Nature Physics}. London: Nature Publishing Group, 2015, roč.~11, č.~6, s.~462-467. ISSN~1745-2473. Dostupné z: https://dx.doi.org/10.1038/NPHYS3322.
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