Magnetic order in α -RuCl 3 : A honeycomb-lattice quantum magnet with strong spin-orbit coupling

By J. Sears, M. Songvilay, K. Plumb, J. Clancy, Y. Qiu, Yang Zhao, Yang Zhao, D. Parshall, Young-June Kim. 2014

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We report magnetic and thermodynamic properties of single crystal $\alpha$-RuCl$_3$, in which the Ru$^{3+}$ ($4d^5$) ion is in its low spin state and forms a honeycomb lattice. Two features are observed in both magnetic susceptibility and specific heat data; a sharp peak at 7~K and a broad hump near 10-15K. In addition, we observe a metamagnetic transition between 5~T and 10~T. Our neutron diffraction study of single crystal samples confirms that the low temperature peak in the specific heat is associated with a magnetic order with unit cell doubling along the honeycomb (100) direction, which is consistent with zigzag order, one of the types of magnetic order predicted within the framework of the Kitaev-Heisenberg model.

Subfields: Condensed Matter Physics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/a70333d5517bf6a5d9876ca8a87032e3c3fbba56

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In Condensed Matter Physics

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