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RESEARCH PRODUCT
Pulsed electron beam excited transient absorption in SrTiO3
S. E. KapphanLarisa GrigorjevaV.a. TrepakovDonāts MillersVladimir Pankratovsubject
Nuclear and High Energy PhysicsRange (particle radiation)ChemistryAbsorption bandExcited stateUltrafast laser spectroscopyElectronAtomic physicsPolaronAbsorption (electromagnetic radiation)InstrumentationSpectral linedescription
Abstract Transient absorption (TA) spectra and optical density relaxation kinetics in SrTiO3 (STO), STO–Nb and STO–V were studied. The electron polaron free or bound at intrinsic defect is suggested to be responsible for the TA band at ∼1.4 eV observed in STO. The band peaking below 0.75 eV in STO–Nb is proposed to be from Nb4+. The electron center V3+ or electron polaron bound in the vicinity of V4+ is responsible for the absorption band at 1.0 eV in STO–V. The absorption from hole polarons is suggested to be in the range 1.8–2.3 eV. It is shown that TA in pure STO at room temperature decays due to electron–hole polaron recombination.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-10-01 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |