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- W2028265802 abstract "High-resolution x-ray diffraction (HRXRD) and photoluminescence (PL) have been used to study the diffusion of atoms in 8-nm Ga0.628In0.372N0.015As0.985∕GaAs quantum well, with and without dielectric encapsulants. These samples were repeatedly annealed in the temperature range of 680–800 °C over times of up to 16 000 s. HRXRD simulations, by using dynamic scattering theory and Fick’s diffusion model with a constant diffusion coefficient, demonstrate that the diffusion lengths are shorter than 2 nm under the annealing conditions studied. In this range of diffusion lengths, the transition energy Ee1−Hh1, numerically calculated from the Schrödinger equation using a potential derived from the diffusion equation, increases linearly as the square of the diffusion length. The steady-state PL blueshifts, after a fast initial blueshift due to the rearrangement of local nitrogen bonding configurations N–GamIn4−m(0⩽m⩽4), otherwise known as short-range order, as a function of annealing time are well fitted by using the linear function. The values of ΔESRO and diffusion coefficients obtained are 18–28 meV and 3.0×10−20–3.5×10−18cm2∕s, respectively. The activation energy characterized from the diffusion coefficients at different temperatures is 3.25 eV and is not affected by the dielectric encapsulates." @default.
- W2028265802 created "2016-06-24" @default.
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- W2028265802 date "2006-01-01" @default.
- W2028265802 modified "2023-10-18" @default.
- W2028265802 title "Anneal-induced interdiffusion in 1.3-μmGaInNAs∕GaAs quantum well structures grown by molecular-beam epitaxy" @default.
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- W2028265802 doi "https://doi.org/10.1063/1.2150259" @default.
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