- Tytuł:
- Oscillator Strengths for Neutral, Charged, and Scattered Excitons in CdTe Quantum Wells Containing a 2D Electron Gas
- Autorzy:
-
Cox, R. T.
Huard, V.
Bourgognon, C.
Saminadayar, K.
Tatarenko, S.
Miller, R. B. - Powiązania:
- https://bibliotekanauki.pl/articles/2038298.pdf
- Data publikacji:
- 2004-09
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
78.30.Fs
78.67.De
78.40.Fy
78.55.Et - Opis:
- Absorption spectra have been measured for a 10 nm CdTe(0.3%Mn) quantum well with electron concentration n$\text{}_{e}$ variable up to 1.5×10$\text{}^{11}$cm$\text{}^{-2}$. Following recent theory appropriate to low n$\text{}_{e}$, here ≈0.1/π a$\text{}_{B}^{2}$, the spectra are interpreted in a "strong exciton" model, where the initial oscillator strength of the excitonic resonance (X) is conserved, with screening and phase-space filling effects negligible. As n$\text{}_{e}$ increases in zero-field and as the filling factorν increases in magnetic field, the intensity of X is transferred to: (i) trion processes, namely exciton-one electron scattering and the trion resonance (T), and (ii) quatron processes, namely exciton-two electron scattering and trion-one electron scattering. In magnetic field, the three- and four-body scattering processes become discrete, combined "exciton and cyclotron" and combined "trion and cyclotron" excitations that take all the intensity of X and T for ν≾1 and ν>2, respectively.
- Źródło:
-
Acta Physica Polonica A; 2004, 106, 3; 287-298
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł