Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-04-12
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
minor typing errors (minus sign in eq. (5))
Scientific paper
10.1088/0022-3727/37/21/002
We have studied a 50/50\AA superlattice of GaAs/Al$_{0.21}$Ga$_{0.79}$As composition, modulation-doped with Si, to produce $n=1.4\times 10^{12}$ cm$^{-2}$ electrons per superlattice period. The modulation-doping was tailored to avoid the formation of Tamm states, and photoluminescence due to interband transitions from extended superlattice states was detected. By studying the effects of a quantizing magnetic field on the superlattice photoluminescence, the miniband energy width, the reduced effective mass of the electron-hole pair, and the band gap renormalization could be deduced.
Abramof E.
Henriques Alfredo B.
Lamas T. E.
Oliveira Rodrigo F.
Quivy A. A.
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