New Type Phase Transition of Li2RuO3 with Honeycomb Structure

Yoko Miura; Yukio Yasui; Masatoshi Sato; Naoki Igawa; Kazuhisa Kakurai

doi:10.1143/JPSJ.76.033705

New Type Phase Transition of Li2RuO3 with Honeycomb Structure

Strongly Correlated Electrons 2015-06-25 v1 Materials Science

Authors: Yoko Miura , Yukio Yasui , Masatoshi Sato , Naoki Igawa , Kazuhisa Kakurai

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Abstract

A new-type structural transition has been found in Li2RuO3 with honeycomb lattice of edge-sharing RuO6-octahedra. With decreasing temperature T, the electrical resistivity exhibits an anomalous increase at T=Tc~540 K, suggesting the (metal to insulator)-like transition and the magnetic susceptibility also shows a sharp decrease. Detailed structure analyses have revealed that the high temperature space group C2/m changes to P21/m at Tc. The most striking fact is that a significant reduction of the bond lengths is found between two of six Ru-Ru pairs of the hexagon in the low temperature phase, indicating a new type phase transition by the mechanism of the formation of molecular orbits of these Ru-Ru pairs.

Keywords

Li2RuO3 honeycomb lattice structural phase transition metal-insulator transition molecular orbitals Ru-Ru pairs

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@article{arxiv.cond-mat/0612026,
  title  = {New Type Phase Transition of Li2RuO3 with Honeycomb Structure},
  author = {Yoko Miura and Yukio Yasui and Masatoshi Sato and Naoki Igawa and Kazuhisa Kakurai},
  journal= {arXiv preprint arXiv:cond-mat/0612026},
  year   = {2015}
}

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4 pages, 7 figures, submitted to J. Phys. Soc. Jpn

New Type Phase Transition of Li2RuO3 with Honeycomb Structure

Abstract

Keywords

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