Schematic pictures of (Left) spin-orbital liquid state (Right) valence bond solid state. In the present copper oxide with a perovskite structure, a spin-orbital entangled short-range-ordered state is expected on a honeycomb Cu(II) lattice. A pair of up and down arrows indicates a singlet dimer state based on the neighboring Cu2+ spins. A snap shot of this short range ordered state is depicted in the left panel. By breaking the structural condition to suppress the Jahn-Teller distortion, it is possible to realize the valence bond solid state in the crystal with a lattice distortion as shown in the right panel.
July 14, 2015
Copper oxides without Jahn-Teller distortion
Professor Masayuki Hagiwara at the Center for Advanced High Magnetic Field Science, Graduate School of Science, Assistant Professor Takehito Nakano and Professor Yasuo Nozue at Graduate School of Science (Dean: Atsushi Shinohara) have realized “copper oxides without Jahn-Teller distortion” in collaboration with the groups of Nagoya University, The University of Tokyo, Huazhong University of Science and Technology, Tohoku University, John-Hopkins University, and Iwate University. The present result was launched on line in the Proceedings of the National Academy of Science, U.S.A. on July 13, 2015 (EST 3 PM).
