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• W2087272435 endingPage "12915" @default.
• W2087272435 startingPage "12908" @default.
• W2087272435 abstract "Pump-probe transmission experiments have been performed on PbSe above the fundamental absorption edge near 4 ensuremath{mu}m in the temperature range 30 to 300 K, using the Dutch ps free-electron laser. For temperatures below 200 K and carrier densities above the threshold for stimulated emission, stimulated recombination represents the most efficient recombination mechanism with relatively fast kinetics in the 50--100-ps regime, in good agreement with earlier reports of photoluminescent emission. Above this temperature Auger recombination dominates, and the Auger coefficient C is determined from the pump-probe decay curves. In the low-temperature regime the Auger coefficient is determined from the decay curves at times beyond 100 ps. The Auger coefficient is approximately constant (with a value of about $8ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}28} {mathrm{cm}}^{6}{mathrm{}mathrm{s}}^{mathrm{ensuremath{-}}1})$ between 300 and 70 K, and then drops a value of about $1ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}28} {mathrm{cm}}^{6}{mathrm{}mathrm{s}}^{mathrm{ensuremath{-}}1}$ at 30 K, in good agreement with the theory for nonparabolic near-mirror bands and nondegenerate statistics. It is found that C for PbSe is between one and two orders of magnitude lower than for ${mathrm{Hg}}_{1ensuremath{-}x}{mathrm{Cd}}_{x}mathrm{Te}$ of comparable band gap." @default.
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• W2087272435 date "1998-11-15" @default.
• W2087272435 modified "2023-10-06" @default.
• W2087272435 title "Auger recombination dynamics of lead salts under picosecond free-electron-laser excitation" @default.
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• W2087272435 doi "https://doi.org/10.1103/physrevb.58.12908" @default.
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