Publication
Physical Review Letters
Paper

Raman studies of underdamped soft modes in PbTiO3

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Abstract

Unlike other ferroelectric perovskites, PbTiO3 displays temperature-dependent Raman spectra consisting of underdamped modes, including the "soft" transverse-optical (TO) modes. Moreover, the softest TO mode shows linewidth divergence at the ferroelectric-to-paraelectric transition. Also in contrast to previously studied perovskites, Raman selection rules are rigorously obeyed in both the ferroelectric and paraelectric states. © 1970 The American Physical Society.

Date

20 Jul 1970

Publication

Physical Review Letters

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