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Showing 2000 · cond-mat.mtrl-sciShow all
3 papers · 2 filters
cond-mat.mtrl-sci2000★ 5 cited
The broad Brillouin doublets and central peak of KTaO_3
E. Farhi, A. K. Tagantsev, B. Hehlen +3
The incipient ferroelectric KTaO3 presents low-T Brillouin spectra anomalies,e.g. a broad central peak (CP), and some additional Brillouin doublets (BD), whose origin is interprete…
cond-mat.mtrl-sci2000
The Broad Brillouin Doublet and CP of Ktao_3 : Second Sound vs. Two-Phonon Difference Scattering
E. Farhi, A. K. Tagantsev, B. Hehlen +3
Low-T Brillouin spectra of the incipient ferroelectric KTaO3 exhibit a broad central peak (CP), and additional Brillouin doublets (BD), that can both be related to phonon-density f…
cond-mat.mtrl-sci2000★ 9 cited
Optical mode crossings and the low temperature anomalies of SrTiO3
E. Courtens, B. Hehlen, E. Farhi +1
Optical mode crossing is not a plausible explanation for the new broad Brillouin doublet nor for the strong acoustic anomalies observed at low temperatures in SrTiO3. Data presente…