Pressure dependence of the bandgap bowing in zinc-blende ZnTe1-xSex
Yükleniyor...
Tarih
2002
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We report on the pressure dependence of the bandgap bowing in the ZnTe1-xSex alloy, in the whole composition range. The bandgap bowing parameter is shown to increase almost linearly with pressure from 1.23 at ambient pressure to 1.6 at 7 GPa. Saturation effects observed in the pressure dependence for x = 0.1 and x = 0.2 are shown to be related to the direct-to-indirect crossover. Results are discussed and interpreted in the framework of structural relaxation models for gap bowing. A prediction of these models (the negative bowing of the Gamma(15) - X-1 transition) is shown to be compatible with the fact that the direct-to-indirect crossover pressure increases with the Se content.
Açıklama
39th European-High-Pressure-Research-Group Meeting (EHPRG 39) -- SEP 16-19, 2001 -- SANTANDER, SPAIN
Anahtar Kelimeler
II-VI semiconductors, semiconductor alloy, gap bowing, pressure dependence
Kaynak
High Pressure Research
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
22
Sayı
2
