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Titolo:
ATOMIC CONFIGURATION AND FAR-INFRARED OPTICAL-SPECTRA OF LATTICE-VIBRATIONS OF ZN-TE AND CD-TE MODES IN CD1-XZNXTE (X=0-0.2)
Autore:
BELOGOROKHOV AI; BELOGOROKHOVA LI; BELOV AG; LAKEENKOV VM; LIBERANT LM; SMIRNOVA NA;
Indirizzi:
INST RARE MET,LENINSKY PROSP 156-517 MOSCOW 117571 RUSSIA MOSCOW MV LOMONOSOV STATE UNIV,DEPT PHYS MOSCOW 119899 RUSSIA
Titolo Testata:
Journal of crystal growth
fascicolo: 1-4, volume: 159, anno: 1996,
pagine: 186 - 190
SICI:
0022-0248(1996)159:1-4<186:ACAFOO>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
9
Recensione:
Indirizzi per estratti:
Citazione:
A.I. Belogorokhov et al., "ATOMIC CONFIGURATION AND FAR-INFRARED OPTICAL-SPECTRA OF LATTICE-VIBRATIONS OF ZN-TE AND CD-TE MODES IN CD1-XZNXTE (X=0-0.2)", Journal of crystal growth, 159(1-4), 1996, pp. 186-190

Abstract

Lattice reflection spectra of Cd1-xZnxTe (x = 0-0.2) alloys have beenanalyzed using the Kramers-Kroning method, and the function of the crystal dielectric permeability has been restored from the reflection spectra using dispersion analysis with subsequent expansion into Lorenz contours of lattice oscillators. The oscillator frequencies correspondto four CdTe oscillation modes and four ZnTe modes in accordance withthe model for the CdZnTe structure consisting of five Cd(4 - n)Zn(n)Te (n = 0-4) basis tetrahedral cells of Cd and Zn cations around one common Te anion. Analysis of the lattice oscillator strengths for compositions x = 0.06-0.2 revealed no deviation from the random Cd and Zn distribution over the cation sublattice. At x approximate to 0.05, the experimental distributions deviate drastically from the theoretically predicted oscillator strengths. For this reason, we treated the data for 0.04 < x < 0.05 under the assumption that the electronic density of the CdTe bonds is shifted toward Te. This phenomenon may initiate the formation of Te-Te centers with a localized hole and violates the cubic symmetry in the vicinity of Te atoms.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 03:47:50