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- W413567251 abstract "(GaAs) 8 /(Al 0.3 Ga 0.7 As) 12 short period superlattice (SPSL) and bulk Al 0.3 Ga 0.7 As have been studied by photoluminescence (PL) measurements at liquid nitrogen temperature under nigh pressure up to 3GPa. The pressure coefficients of the direct and indirect gaps in bulk Al 0.3 Ga 0.7 As are 86±3 and -15.7±0.7 meV/GPa, respectively. The observed transitions from conduction X-like electrons to heavy hole states in (GaAs) 8 /(Al 0.3 Ga 0.7 As) 12 SPSL have an unexpected pressure coefficient, -22±1 meV/GPa, which is interpreted as evidence for a pressure dependence of the valence-band offset (Δ E v ) of approximately 6 meV/GPa. This value is about twice the result of Lambkin et al. Our results show that the pressure coefficient of the valence-band offset in GaAs/Al x Ga 1-x As superlattice is dependent not only on aluminum concentration but also on the superlattice structure. Moreover, the fractional conduction- and valence-band offsets of (GaAs) 8 /(Al 0.3 Ga 0.7 As) 12 SPSL are also pressure and SL structure dependent." @default.
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- W413567251 date "1993-01-01" @default.
- W413567251 modified "2023-09-26" @default.
- W413567251 title "Pressure Dependence of the Valence-Band Offset in (GaAs)<sub>8</sub>/(Al<sub>0.3</sub>Ga<sub>0.7</sub>As)<sub>12</sub> Short Period Superlattice" @default.
- W413567251 doi "https://doi.org/10.7567/jjaps.32s1.125" @default.
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