Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
LOW-FREQUENCY RAMAN INVESTIGATION OF TUNNELING STATES IN GLASSES
Autore:
TERKI F; PRAT JL; PELOUS J;
Indirizzi:
UNIV MONTPELLIER 2,LAB VERRES,UMR 5587,CASE COURIER 069,PL EUGENE BATAILLON F-34095 MONTPELLIER 05 FRANCE
Titolo Testata:
Philosophical magazine. B. Physics of condensed matter.Statistical mechanics, electronic, optical and magnetic
fascicolo: 2, volume: 77, anno: 1998,
pagine: 373 - 380
SICI:
1364-2812(1998)77:2<373:LRIOTS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCATTERING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
F. Terki et al., "LOW-FREQUENCY RAMAN INVESTIGATION OF TUNNELING STATES IN GLASSES", Philosophical magazine. B. Physics of condensed matter.Statistical mechanics, electronic, optical and magnetic, 77(2), 1998, pp. 373-380

Abstract

Low-temperature Raman scattering measurements have been carried out in two oxide glasses. In the low-frequency range; the heavy-metal oxideglass (NbTa) exhibits a characteristic temperature dependence similarto that recently found in another glass from the same glass family (LaSF7). Indeed, an increase in the scattered intensity is again observed below 10K, suggesting a coupling of the light with tunnelling statesby resonant interaction. On the contrary, no evidence of such effect has been found in the silicate lead glass (PbO). One explanation for these two distinct behaviours may originate from the existence of polarimpurities or electronic defects in LaSF7 and NbTa glasses. As these heavy-metal oxide glasses present an efficient photoluminescence contribution at low temperatures related to the chemical components, we have checked that the Raman increased effect at low frequencies cannot beattributed to a residual photoluminescence contribution.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 10:23:11