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. 2017 May 12;8:15271. doi: 10.1038/ncomms15271

Figure 1. Complex dielectric function and loss function spectra of pressure-dependent Sr1−xNbO3+δ films.

Figure 1

(a) Real part of complex dielectric function, ɛ1(ω), of lp-SNO (5 × 10−6 Torr), mp-SNO (3 × 10−5 Torr) and hp-SNO (1 × 10−4 Torr) films. Vertical dashed lines indicate the zero-crossings of ɛ1(ω) of lp-SNO (red) and mp-SNO (purple) films. (b) Imaginary part of complex dielectric function, ɛ2(ω), and loss function, −Im [ɛ−1(ω)], spectra of lp-SNO film. (c) The ɛ2(ω) and −Im [ɛ−1(ω)] spectra of mp-SNO film. (d) The ɛ2(ω) and −Im [ɛ−1(ω)] spectra of hp-SNO film. Insets show parts of the spectra zoomed in for clarity.