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- W2069242598 abstract "We have studied the dielectric properties of the ferromagnetic spinel $mathrm{Cd}{mathrm{Cr}}_{2}{mathrm{S}}_{4}$ from first principles. Zone-center phonons and Born effective charges were calculated by frozen-phonon and Berry phase techniques within $mathrm{LSDA}+U$. We find that all infrared-active phonons are quite stable within the cubic space group. The calculated static dielectric constant agrees well with previous measurements. These results suggest that the recently observed anomalous dielectric behavior in $mathrm{Cd}{mathrm{Cr}}_{2}{mathrm{S}}_{4}$ is not due to the softening of a polar mode. We suggest further experiments to clarify this point." @default.
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- W2069242598 date "2005-12-30" @default.
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- W2069242598 title "Polar phonons and intrinsic dielectric response of the ferromagnetic insulating spinel<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>Cd</mml:mi><mml:msub><mml:mi mathvariant=normal>Cr</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>S</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>from first principles" @default.
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- W2069242598 doi "https://doi.org/10.1103/physrevb.72.214123" @default.
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