Leon Balents
Science 336, 547 (2012)
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| Frustrated ordering. Artist’s conception of a nanoscale region of honeycomb lattice of ionic and spin structure in Ba3CuSb2O9 studied by Nakatsuji et al. Copper-antimony (Cu-Sb) dumbbells are oriented vertically, with Cu atoms in red and Sb in blue. |
Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice.
S. Nakatsuji, et al.
Science 336, 559 (2012)
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| (A) Centrosymmetric P63/mmc high-T structure of Ba3CuSb2O9 indicating nanoscale Cu-Sb dumbbell ordering. (B) A characteristic vertex with spin-orbital degrees of freedom for the Cu-honeycomb lattice of Ba3CuSb2O9. A trigonal coverage of a Cu-hexagon by spin singlets (pair of blue or green arrows) based on a dx2−y2 ferro-orbital (green) state at two Cu sites (blue shaded) is shown. (C) Superstructure peaks found in an (h k 10) slice extracted from a 3D volume of synchrotron x-ray diffraction data at 20 K for an orthorhombic single-crystalline sample (12). |
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