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arXiv · 2009.07541

Kitaev Spin Liquid Candidate OsxCl3 Comprised of Honeycomb Nano-Domains

K. Kataoka·D. Hirai·T. Yajima·D. Nishio-Hamane·R. Ishii·K. -Y. Choi·D. Wulferding·P. Lemmens·S. Kittaka·T. Sakakibara·H. Ishikawa·A. Matsuo·K. Kindo·Z. Hiroi
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Abstract

An osmium chloride with the chemical formula of OsxCl3 (x = 0.81) was synthesized and its crystal structure and thermodynamic properties were investigated. OsxCl3 crystallizes in a layered CdCl2-type structure with the triangular lattice partially occupied by Os ions on average. However, on microscopic length scales, the triangular lattice is composed of nano-domains with a honeycomb arrangement of Os ions, as observed by electron microscopy and Raman scattering experiments. Magnetization and heat capacity measurements revealed an absence of magnetic long-range order down to 0.08 K, while a broad peak in heat capacity at 0.15 K may indicate a short-range order in the local honeycomb lattice. OsxCl3 may exhibit certain aspects of the Kitaev spin liquid that are expected for a perfect honeycomb lattice of osmium trichloride.

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K. Kataoka, D. Hirai, T. Yajima, D. Nishio-Hamane, R. Ishii, K. -Y. Choi, D. Wulferding, P. Lemmens, S. Kittaka, T. Sakakibara, H. Ishikawa, A. Matsuo, K. Kindo, Z. Hiroi. 2020-09-16. Kitaev Spin Liquid Candidate OsxCl3 Comprised of Honeycomb Nano-Domains. https://doi.org/10.7566/jpsj.89.114709

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