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Updated: Jan 27, 2026
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
A series of magnon crystals appearing under ultrahigh magnetic fields in a kagomé antiferromagnet
R Okuma1, D Nakamura2, T Okubo3
1Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba, 277-8581, Japan. rokuma@issp.u-tokyo.ac.jp.
Abstract:
Geometrical frustration and a high magnetic field are two key factors for realizing unconventional quantum states in magnetic materials. Specifically, conventional magnetic order can potentially be destroyed by competing interactions and may be replaced by an exotic state that is characterized in terms of quasiparticles called magnons, the density and chemical potential of which are controlled by the magnetic field. Here we show that a synthetic copper mineral, Cd-kapellasite, which comprises a kagomé lattice consisting of corner-sharing triangles of spin-1/2 Cu2+ ions, exhibits an unprecedented series of fractional magnetization plateaus in ultrahigh magnetic fields of up to 160 T. We propose that these quantum states can be interpreted as crystallizations of emergent magnons localized on the hexagon of the kagomé lattice.
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