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@article{1331263, author = {Chaloupka, Jiří and Khaliullin, Giniyat}, article_location = {USA}, article_number = {2}, doi = {http://dx.doi.org/10.1103/PhysRevB.92.024413}, keywords = {spin models; frustrated magnetism; iridates}, language = {eng}, issn = {1098-0121}, journal = {Physical Review B}, title = {Hidden symmetries of the extended Kitaev-Heisenberg model: Implications for the honeycomb-lattice iridates A2IrO3}, url = {http://journals.aps.org/prb/abstract/10.1103/PhysRevB.92.024413}, volume = {92}, year = {2015} }
TY - JOUR ID - 1331263 AU - Chaloupka, Jiří - Khaliullin, Giniyat PY - 2015 TI - Hidden symmetries of the extended Kitaev-Heisenberg model: Implications for the honeycomb-lattice iridates A2IrO3 JF - Physical Review B VL - 92 IS - 2 SP - nestránkováno EP - nestránkováno PB - The American Physical Society SN - 10980121 KW - spin models KW - frustrated magnetism KW - iridates UR - http://journals.aps.org/prb/abstract/10.1103/PhysRevB.92.024413 L2 - http://journals.aps.org/prb/abstract/10.1103/PhysRevB.92.024413 N2 - We have explored the hidden symmetries of a generic four-parameter nearest-neighbor spin model, allowed in honeycomb-lattice compounds under trigonal compression. Our method utilizes a systematic algorithm to identify all dual transformations of the model that map the Hamiltonian on itself, changing the parameters and providing exact links between different points in its parameter space. We have found the complete set of points of hidden SU(2) symmetry at which a seemingly highly anisotropic model can be mapped back on the Heisenberg model and inherits therefore its properties such as the presence of gapless Goldstone modes. The procedure used to search for the hidden symmetries is quite general and may be extended to other bond-anisotropic spin models and other lattices, such as the triangular, kagome, hyperhoneycomb, or harmonic-honeycomb lattices. We apply our findings to the honeycomb-lattice iridates Na2IrO3 and Li2IrO3, and illustrate how they help to identify plausible values of the model parameters that are compatible with the available experimental data. ER -
CHALOUPKA, Jiří a Giniyat KHALIULLIN. Hidden symmetries of the extended Kitaev-Heisenberg model: Implications for the honeycomb-lattice iridates A2IrO3. \textit{Physical Review B}. USA: The American Physical Society, 2015, roč.~92, č.~2, s.~nestránkováno, 14 s. ISSN~1098-0121. Dostupné z: https://dx.doi.org/10.1103/PhysRevB.92.024413.
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