High-resolution electroreflectance measurements of GaAs |
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Authors: | DE Aspnes AA Studna |
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Institution: | Bell Laboratories, Murray Hill, New Jersey 07974, USA |
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Abstract: | High-resolution surface-barrier electroreflectance measurements are reported for GaAs, taken at 4.2 K in the Schottky barrier configuration. Interference effects between the bulk and space-charge regions are seen at the n = 1 exciton line for both E0 and E0 + Δ0 transitions. We calculate the value μT = (0.055 ± 0.008) me for the transverse mass of the E1 + Δ1 transition from Franz-Keldysh oscillations observed at high fields. The E'0 structure is resolved into separate critical points of Γ and Δ symmetry. Threshold and broadening energies are obtained at 4.2 K for the E0,E0, E0 + Δ0, E1, E1 + Δ1, E'0 (Γ and and E2 (Σ and X) critical points. |
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