| PHONONS AND IONIC CONDUCTIVITY IN THE TWO-DIMENSIONAL SUPERIONIC CONDUCTOR AgCrS2 (1981) | |||||||||||||||
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| Far-infrared technique, coherent and incoherent neutron scattering have been used to study the lattice dynamics of AgCrS2 at different temperatures. The low frequency TO mode shows a pronounced softening between 10 K and 700 K. The data are analyzed with a rigid-ion model and it is shown that the pattern of eigenvectors of the low energy modes (ν < 45cm-1) give basic information for the diffusion process of the Ag ions. | |||||||||||||||
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