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https://doi.org/10.1063/1.4923320
| Title: | Temperature dependence of photoluminescence spectra of bilayer two-dimensional electron gases in LaAlO3/SrTiO3 superlattices: Coexistence of Auger recombination and single-carrier trapping | Authors: | Ma, H.J.H Venkatesan, T Wang, S.J Ariando, NUSNNI-Nanocore, National University of Singapore117411, Singapore, Department of Physics, National University of Singapore117542, Singapore |
Keywords: | Augers Electron gas Electron traps Lanthanum alloys Photoluminescence Superlattices Temperature distribution Two dimensional electron gas Auger recombination Conducting channels High temperature Photoluminescence spectrum Temperature dependence Temperature dependent Temperature independents Two-dimensional electron gases (2DEG) Electrons |
Issue Date: | 2015 | Citation: | Ma, H.J.H, Venkatesan, T, Wang, S.J, Ariando, NUSNNI-Nanocore, National University of Singapore117411, Singapore, Department of Physics, National University of Singapore117542, Singapore (2015). Temperature dependence of photoluminescence spectra of bilayer two-dimensional electron gases in LaAlO3/SrTiO3 superlattices: Coexistence of Auger recombination and single-carrier trapping. AIP Advances 5 (6) : 67163. ScholarBank@NUS Repository. https://doi.org/10.1063/1.4923320 | Abstract: | We report emerging photoluminescence (PL) of bilayer two-dimensional electron gases (2DEG) in LaAlO3/SrTiO3 (LAO/STO) systems. A strong blue PL emerges in bilayer-2DEGs in LAO/STO/LAO/STO which doesn't show in LAO/STO. PL band in bilayer-2DEGs includes both nearly temperature independent Auger recombination and temperature dependent free electron trapping while it crossovers from Auger recombination to single carrier trapping in LAO/STO. The PL signal of free electron trapping appears at high temperatures and it is much stronger than Auger recombination in the conducting channel in bilayer 2DEGs. This observation shows that high mobility carriers dominate the carrier dynamics in bilayer-2DEGs in LAO/STO superlattices. © 2015 Author(s). | Source Title: | AIP Advances | URI: | https://scholarbank.nus.edu.sg/handle/10635/176147 | ISSN: | 2158-3226 | DOI: | 10.1063/1.4923320 |
| Appears in Collections: | Elements Staff Publications |
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