Table 1. Optical and plasmonic excitations in pressure-dependent Sr1−xNbO3+δ films.
|
Optical (ɛ(ω)) |
Plasmonic (loss function) |
||
|---|---|---|---|
| Peak | Energy (eV) | Peak | Energy (eV) |
| lp-SNO | |||
| A1 | 0 | A′1 | ∼1.9 |
| A2 | ∼4.6–∼5.3 | — | — |
| A3 | ∼5.3–∼6.5 | — | — |
| mp-SNO | |||
| B1 | 0 | B′1 | ∼1.7 |
| B2 | ∼3.5 | B′2 | ∼3.5 |
| B3 | ∼4.5 | B′3 | ∼4.5 |
| B4 | ∼4.6–∼5.2 | — | — |
| B5 | ∼5.2–∼6.5 | — | — |
| hp-SNO | |||
| C1 | ∼1.7 | C′1 | ∼1.7 |
| C2 | ∼3.0 | C′2 | ∼3.0 |
| C3 | ∼4.0 | C′3 | ∼4.0 |
| C4 | ∼4.5 | C′4 | ∼4.6 |
| C5 | ∼4.6–∼5.5 | C′5 | ∼5.5 |
| C6 | ∼5.5–∼6.5 | — | — |
The peaks in the imaginary part of complex dielectric function, ɛ2(ω), and loss function, −Im [ɛ−1(ω)], spectra of lp-SNO (5 × 10−6 Torr), and hp-SNO (1 × 10−4 Torr) films are listed along with their photon energy positions. The peaks at 0 eV in lp-SNO and mp-SNO are Drude peaks associated with metallic free charges.