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Updated: Jul 2, 2026

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Published on: August 15, 2018
Magnetic ground state and transition of a quantum multiferroic LiCu2O2
S W Huang1, D J Huang, J Okamoto
1National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan.
Abstract:
Based on resonant soft x-ray magnetic scattering, we report that LiCu2O2 exhibits a large interchain coupling which suppresses quantum fluctuations along spin chains, and a quasi-2D short-range magnetic order prevails at temperatures above the magnetic transition. These observations unravel the fact that the ground state of LiCu2O2 possesses long-range 2D-like incommensurate magnetic order rather than being a gapped spin liquid as expected from the nature of quantum spin-1/2 chains. In addition, the spin coupling along the c axis is found to be essential for inducing electric polarization.
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