Intriguing relaxor ferroelectricity in a polar CT crystal at the neutral-ionic interface
J. K. H. Fischer,
G. D'Avino,
M. Masino
et al.
Abstract:We investigated the mixed-stack charge-transfer crystal, N,N-dimethylphenazine-TCNQ (M2P-TCNQ), which is polar at room temperature and just at the neutral-to-ionic interface (ionicity ρ ≈ 0.5). We detect the typical dielectric signature of a relaxor ferroelectric and an asymmetric positive-up-negative-down behavior. While relaxor ferroelectricity is usually ascribed to disorder in the crystal, we find no evidence for structural disorder in the investigated crystals. To elucidate the origin of M2P-TCNQ's dielec… Show more
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