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Titolo:
LIGHT-HOLE - HEAVY-HOLE EXCITON CROSSOVER IN STRAINED ZNS
Autore:
OZANYAN KB; MAY L; NICHOLLS JE; HOGG JHC; HAGSTON WE; LUNN B; ASHENFORD DE;
Indirizzi:
UNIV HULL,DEPT APPL PHYS KINGSTON HULL HU6 7RX N HUMBERSIDE ENGLAND UNIV HULL,DEPT ENGN DESIGN & MANUFACTURE KINGSTON HULL HU6 7RX N HUMBERSIDE ENGLAND
Titolo Testata:
Solid state communications
fascicolo: 5, volume: 97, anno: 1996,
pagine: 345 - 348
SICI:
0038-1098(1996)97:5<345:L-HECI>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
EDGE EMISSIONS; SUPERLATTICES; LASER;
Keywords:
SEMICONDUCTORS; THIN FILMS; OPTICAL PROPERTIES; ELECTRONIC STATES (LOCALIZED); LUMINESCENCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
K.B. Ozanyan et al., "LIGHT-HOLE - HEAVY-HOLE EXCITON CROSSOVER IN STRAINED ZNS", Solid state communications, 97(5), 1996, pp. 345-348

Abstract

Near band edge photoluminescence (PL) of ZnS layers MBE-grown on GaP is investigated at 4.2K under fully strained, partially relaxed and fully relaxed conditions. PL peaks are attributed to heavy-hole (hh) or light-hole (lh)-related transitions by comparison with the calculated strain shift for the hh and lh bandgaps. It is shown that, while the free-to-bound (e,A(0)) transition retains its hh character over the whole range from fully strained to fully relaxed conditions, a hh-lh exciton crossover is observed at intermediate strain. This observation is interpreted within the hydrogenic model for shallow states by scaling the hh-related ionisation energies with the lh to hh effective mass ratio and comparing the result with the strain shift of the lh bandgap. Values for the deformation potentials are derived and compared with theoretical and earlier experimental ones.

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Documento generato il 09/04/20 alle ore 18:32:53