Surface Recombination in Ultra-Fast Carrier Dynamics of Perovskite Oxide La0.7 Sr0.3 MnO3 Thin Films

ACS Nano
Saeed Yousefi SarrafMikel B Holcomb

Abstract

Aspects of the optoelectronic performance of thin-film ferromagnetic materials are evaluated for application in ultrafast devices. Dynamics of photocarriers and their associated spin polarization are measured using transient reflectivity (TR) measurements in cross linear and circular polarization configurations for La0.7Sr0.3MnO3 films with a range of thicknesses. Three spin-related recombination mechanisms have been observed for thicker films (thickness of d ≥ 20 nm) at different time regimes (τ), which are attributed to the electron-phonon recombination (τ < 1 ps), phonon-assisted spin-lattice recombination (τ ∼ 100 ps), and thermal diffusion and radiative recombination (τ > 1 ns). Density functional theory (DFT+U) based first-principles calculations provide information about the nature of the optical transitions and their probabilities for the majority and the minority spin channels. These transitions are partly responsible for the aforementioned recombination mechanisms, identified through the comparison of linear and circular TR measurements. The same sets of measurements for thinner films (4.4 nm ≤ d < 20 nm) revealed an additional relaxation dynamic (τ ∼ 10 ps), which is attributed to the enhanced surface recombination o...Continue Reading

References

Dec 15, 1994·Physical Review. B, Condensed Matter·P E Blöchl
Aug 15, 1995·Physical Review. B, Condensed Matter·A I LiechtensteinJ Zaanen
Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Jan 1, 1993·Physical Review. B, Condensed Matter·G Kresse, J Hafner
Jun 4, 2008·Physical Review Letters·John P PerdewKieron Burke
Dec 17, 2008·Nature Materials·Georg M MüllerMarkus Münzenberg
Jul 1, 2014·Nature Nanotechnology·Shoji YoshidaHidemi Shigekawa
Sep 4, 2015·Nano Letters·Jasmina A SichertJochen Feldmann
Nov 19, 2015·ACS Applied Materials & Interfaces·Nirmal AdhikariQiquan Qiao
May 17, 2017·ACS Applied Materials & Interfaces·Er-Jia GuoMichael R Fitzsimmons
Aug 28, 2018·ACS Applied Materials & Interfaces·Xiaoming WenDavid J Moss
Sep 1, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Navid MottaghiMikel B Holcomb
Sep 27, 2018·Scientific Reports·Robbyn TrappenMikel B Holcomb

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Citations

Jun 6, 2019·Optics Express·S Yousefi SarrafM B Holcomb
Mar 10, 2021·Physical Chemistry Chemical Physics : PCCP·Dong Chen, Chun-Lei Wang
Oct 1, 2019··Guerau B. CabreraAndrés Camilo Garcia-Castro

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