Abstract:
The phonons of two end members of Li1+xTi2−xO4 spinel system, i.e., the metallic LiTi2O4 and the insulating Li[Li1/3Ti5/3]O4, are calculated in superspace symmetry approach using a short-range force constant model. The composition dependence of zone-centre optical phonons in Li1+xTi2−xO4 near phase transition and Li1−xMgxTi2O4 has been investigated using different models of substitution.One-andtwo-mode behavior is therefore predicted for F1u and F2u modes in case of tetrahedral and octahedral substitution, respectively.
Description:
Shkirta I.M. Phonon spectra near metal-insulator phase transition in Li1+xTi2−xO4 system / E.P.Buletsa, O.F.Ivanyas, V.J.Kindrat, I.I.Nebola, I.M.Shkirta, A.J.Shtejfan // Condensed Matter Physics - 2004. - С. 53-62.
