Honeycomb-Structure RuI3, A New Quantum Material Related to α-RuCl3

Danrui Ni, Xin Gui, Kelly M. Powderly, Robert J. Cava

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23 Scopus citations


The layered honeycomb lattice material α-RuCl3 has emerged as a prime candidate for displaying the Kitaev quantum spin liquid state, and as such has attracted much research interest. Here a new layered honeycomb lattice polymorph of RuI3, a material that is strongly chemically and structurally related to α-RuCl3 is described. The material is synthesized at moderately elevated pressures and is stable under ambient conditions. Preliminary characterization reveals that it is a metallic conductor, with the absence of long-range magnetic order down to 0.35 K and an unusually large T-linear contribution to the heat capacity. It is proposed that this phase, with a layered honeycomb lattice and strong spin–orbit coupling, provides a new route for the characterization of quantum materials.

Original languageEnglish (US)
Article number2106831
JournalAdvanced Materials
Issue number7
StatePublished - Feb 17 2022

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • General Materials Science


  • Kitaev quantum spin liquids
  • high-pressure synthesis
  • honeycomb layers
  • ruthenium iodide
  • ruthenium trihalide


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