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Titolo:
PHONON ANOMALIES IN SRTIO3 IN THE QUANTUM PARAELECTRIC REGIME
Autore:
COURTENS E; CODDENS G; HENNION B; HEHLEN B; PELOUS J; VACHER R;
Indirizzi:
IBM CORP,DIV RES,ZURICH RES LAB CH-8803 RUSCHLIKON SWITZERLAND CENS,CNRS,CEA,LAB LEON BRILLOUIN F-91191 GIF SUR YVETTE FRANCE UNIV MONTPELLIER 2,CNRS,SCI MAT VITREUX LAB 1119 F-34095 MONTPELLIER FRANCE
Titolo Testata:
Physica scripta. T
, volume: T49B, anno: 1993,
pagine: 430 - 435
SICI:
0281-1847(1993)T49B:<430:PAISIT>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRONTIUM-TITANATE; PHASE; SCATTERING; TRANSITION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
E. Courtens et al., "PHONON ANOMALIES IN SRTIO3 IN THE QUANTUM PARAELECTRIC REGIME", Physica scripta. T, T49B, 1993, pp. 430-435

Abstract

New inelastic neutron-scattering and Brillouin-scattering results arereported for pressure-oriented SrTiO3 crystals at temperatures below the structural transition. The measurements reveal an unexpectedly large number of anomalies at small frequencies and wave vectors in the quantum paraelectric region. The anomalies include a strong depression of a TA-branch at unusually small wave vectors, an apparent splitting of the same branch, the lifting of a selection rule for the structural mode, and an anomalous temperature dependence of the elastic constant C-44.

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Documento generato il 30/11/20 alle ore 08:56:14