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 and B.J. KIM. Direct evidence for dominant bond-directional interactions in a honeycomb lattice iridate Na2IrO3. Nature Physics, London: Nature Publishing Group, 2015, vol. 11, No 6, p. 462-467. ISSN 1745-2473. doi:10.1038/NPHYS3322.
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Basic information
Original name Direct evidence for dominant bond-directional interactions in a honeycomb lattice iridate Na2IrO3
Name in Czech Přímý důkaz dominantních vazebně-směrových interakcí v iridátu Na2IrO3 s voštinovou mřížkou
Authors CHUN, Sae Hwan (410 Republic of Korea), Jong-Woo KIM (410 Republic of Korea), Jungho KIM (410 Republic of Korea), H. ZHENG (156 China), Constantinos C STOUMPOS (840 United States of America), C.D. MALLIAKAS (840 United States of America), J.F. MITCHELL (840 United States of America), Kavita MEHLAWAT (356 India), Yogesh SINGH (356 India), Y. CHOI (410 Republic of Korea), T. GOG (840 United States of America), A. AL-ZEIN (250 France), M. Moretti SALA (380 Italy), M. KRISCH (276 Germany), Jiří CHALOUPKA (203 Czech Republic, guarantor, belonging to the institution), George JACKELI (268 Georgia), Giniyat KHALIULLIN (643 Russian Federation) and B.J. KIM (410 Republic of Korea).
Edition Nature Physics, London, Nature Publishing Group, 2015, 1745-2473.
Other information
Original language English
Type of outcome article in a journal
Field of Study 10302 Condensed matter physics
Country of publisher United Kingdom
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 18.791
RIV identification code RIV/00216224:14740/15:00086048
Organization unit Central European Institute of Technology
Doi http://dx.doi.org/10.1038/NPHYS3322
UT WoS 000355552200010
Keywords (in Czech) spinové interakce; frustrovaný magnetismus; iridáty; spinové modely
Keywords in English spin interactions; frustrated magnetism; iridates; spin models
Tags podil, rivok
Tags International impact, Reviewed
Changed by Changed by: Mgr. Jiří Chaloupka, Ph.D., učo 53310. Changed: 18/3/2016 10:52.
Abstract
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.
Links
ED1.1.00/02.0068, research and development projectName: CEITEC - central european institute of technology
286154, internal MU codeName: SYLICA - Synergies of Life and Material Sciences to Create a New Future (Acronym: SYLICA)
Investor: European Union, 7th Specific RTD Programme, Capacities
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