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Titolo:
ELECTRONIC-STRUCTURES AND OPTICAL-PROPERTIES OF GETE AND GE2SB2TE5
Autore:
YAMANAKA S; OGAWA S; MORIMOTO I; UESHIMA Y;
Indirizzi:
ASAHI CHEM IND CO LTD,CENT LAB,2-1 SAMEJIMA FUJI SHIZUOKA 416850 JAPAN ASAHI CHEM IND CO LTD,ANALYT & COMPUTAT SCI LAB FUJI SHIZUOKA 416850 JAPAN
Titolo Testata:
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
fascicolo: 6A, volume: 37, anno: 1998,
pagine: 3327 - 3333
SICI:
0021-4922(1998)37:6A<3327:EAOOGA>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
SB-TE SYSTEM; DISK;
Keywords:
PHASE CHANGE RECORDING MATERIALS; ELECTRONIC BAND STRUCTURES; OPTICAL CONSTANTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
S. Yamanaka et al., "ELECTRONIC-STRUCTURES AND OPTICAL-PROPERTIES OF GETE AND GE2SB2TE5", JPN J A P 1, 37(6A), 1998, pp. 3327-3333

Abstract

The optical properties of GeTe and Ge2Sb2Te5 have been studied by means of the density functional theory (DFT) in the local density approximation (LDA). The electronic band structures were obtained by two methods, the plane wave (PW) and spherical wave (SW) expansions of the wave functions. GeTe was calculated to be semiconductive: and Ge2Sb2Te5 to be semimetallic. The frequency dependent optical constants such as refractive index and extinction coefficient were calculated and compared with those obtained experimentally. The origin of the peaks in the extinction coefficient spectra was assigned in terms of the transitionsbetween Ge, Sb and Te p states. Dynamical calculations with respect to Ge2Sb2Te5 have also been performed in order to obtain an understanding of its structural features. The displacements of the Te atoms were found to be larger than those of the Ge and Sb atoms.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 11:11:31