A possible demonstration of cooperative dynamical Jahn-Teller effect in Raman scattering spectrum of rhombohedral LaMnO₃
Popov, S. E. · Nikiforov, A. E.
Original · EN
The Raman scattering (RS) spectra of rhombohedral LaMnO₃ is considered. It is shown that broad high intensity RS line at 640 cm⁻¹ could be explained in the framework of cooperative dynamical Jahn-Teller effect. This hypothesis is illustrated through the lattice dynamics calculations explicitly allowing for the electron-phonon term both in crystal energy and in dynamical matrix. The averaging scheme for the one mode cooperative dynamical effect is proposed
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