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- W2069977492 abstract "Single-dot spectroscopy was used to determine the temperature dependence of the ground-state exciton energy $E(T)$ in self-assembled ${mathrm{In}}_{x}{mathrm{Ga}}_{1ensuremath{-}x}mathrm{As}∕mathrm{GaAs}$ quantum dots (QDs) from $T=2$ up to $ensuremath{sim}100phantom{rule{0.3em}{0ex}}mathrm{K}$. Differences of dot composition and geometry are manifested primarily in the absolute transition energies, whereas the band-gap reduction depends only weakly on microscopic details. $E(T)$ can be well described by semiempirical phonon-dispersion models developed recently for bulk, suggesting that thermal lattice expansion and electron-phonon interaction are the dominant mechanisms for $E(T)$, whereas QD-specific mechanisms seem to be of minor importance, in contrast to observations for nanocrystals." @default.
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- W2069977492 date "2005-08-15" @default.
- W2069977492 modified "2023-10-14" @default.
- W2069977492 title "Temperature dependence of the excitonic band gap in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mi>In</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>Ga</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:mi>As</mml:mi><mml:mo>∕</mml:mo><mml:mi>GaAs</mml:mi></mml:mrow></mml:math>self-assembled quantum dots" @default.
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- W2069977492 doi "https://doi.org/10.1103/physrevb.72.085328" @default.
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