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Proceedings Paper

Oxygen vacancy effect on ultra-fast carrier dynamics of perovskite oxide La0.7Sr0.3MnO3 thin films
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Paper Abstract

Complex oxide thin films, such as La0.7Sr0.3MnO3 (LSMO), are widely studied for a variety of applications. Transient reflectivity (TR) measurements on LSMO indicate enhanced surface recombination of charge carriers in films less than 20 nm in thickness. Oxygen growth pressure variation illustrates that higher oxygen pressures provide more electron dominance in the system, and producing a larger band filling effect which eventually results in higher excitations. Wavelet analysis can distinguish abrupt oscillatory modes with close energy ranges and have been introduced as a method to study sound velocities in ultra-thin films.

Paper Details

Date Published: 27 February 2020
PDF: 6 pages
Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 112780P (27 February 2020); doi: 10.1117/12.2550978
Show Author Affiliations
S. Yousefi, West Virginia Univ. (United States)
R. Trappen, West Virginia Univ. (United States)
N. Mottaghi, West Virginia Univ. (United States)
A. D. Bristow, West Virginia Univ. (United States)
M. B. Holcomb, West Virginia Univ. (United States)

Published in SPIE Proceedings Vol. 11278:
Ultrafast Phenomena and Nanophotonics XXIV
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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