Recombination kinetics of a dense electron-hole plasma in strontium titanate

Details Recombination kinetics of a dense electron-hole plasma in strontium titanate Recombination kinetics of a dense electron-hole plasma in strontium titanate

2007-12-04

arxiv.org/abs/0712.0472v1

Phys. Rev. B 76, 125115 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.76.125115

We investigated the nanosecond-scale time decay of the blue-green light emitted by nominally pure SrTiO$_3$ following the absorption of an intense picosecond laser pulse generating a high density of electron-hole pairs. Two independent components are identified in the fluorescence signal that show a different dynamics with varying excitation intensity, and which can be respectively modeled as a bimolecular and unimolecolar process. An interpretation of the observed recombination kinetics in terms of interacting electron and hole polarons is proposed.

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