Asymmetric response of electrical conductivity and V valence state to strain in cation-deficient Sr1–yVO3 ultrathin films based on absorption measurements at the V L2- and L3-edges

Wu, M.; Huang, S.-Z.; Zeng, H.; Koster, G.; Huang, Y.-Y.; Zheng, J.-C.; Wang, H.-Q.

doi:10.1107/S1600577519007094

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Figure 3
(a) The absorption spectra for Sr_1–yVO₃ films of different thicknesses from 26 to 5 u.c. on an STO substrate with tensile strain. A reference absorption spectrum from Sr₂V₂O₇ powder measured during the same beam time is shown for comparison. (b) The thickness-dependent absorption spectra for Sr_1–yVO₃ films of 26 u.c. on an LAO substrate, and 10 u.c. and 5 u.c. on LSAO substrates. The absorption spectra are shifted vertically by 2 for clarity. (c) and (d) The fitting results of the absorption spectra at the V L₃-edge for 26 u.c. Sr_1–yVO₃ films on an STO substrate with tensile strain and on LAO with a compressive strain, respectively.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 26| Part 5| September 2019| Pages 1687-1693

https://doi.org/10.1107/S1600577519007094

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