Paper: Amplitude mode in the planar triangular antiferromagnet Na0.9MnO2

June 11, 2018

Our paper studies the unusual magnetism of NaMnO2 was published in Nature Communications.  This work established that the strong Jahn-Teller distortion in this system renormalizes the interactions of the triangular spin lattice to be quasi-one dimensional, and the accompanying uniaxial single-ion anisotropy creates an Ising-like anisotropy in the system.  The result is a spin system where magnons have a strong binding energy, creating a rare example of a stable spin amplitude mode.

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