English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report the temperature variation of the $^{119}$Sn-M\"{o}ssbauer spectraof the antiperovskite (inverse perovskite) oxide superconductor Sr$_{3-x}$SnO.Both superconductive (Sr-deficient) and non-superconductive (nearlystoichiometric) samples exhibit major $\gamma$-ray absorption with isomer shiftsimilar to that of Mg$_2$Sn. This fact shows that Sr$_{3-x}$SnO contains themetallic anion Sn$^{4-}$, which is rare especially among oxides. In bothsamples, we observed another $\gamma$-ray absorption with a larger isomershift, indicating that there is another ionic state of Sn with a higheroxidation number. The temperature dependence of the absorption intensitiesreveals that the Sn ions exhibiting larger isomer shifts have a lower energy ofthe local vibration. The larger isomer shift and lower vibration energy areconsistent with the values estimated from the first-principles calculations forhypothetical structures with various Sr-deficiency arrangements. Therefore, weconclude that the additional $\gamma$-ray absorptions originate from the Snatoms neighboring the Sr deficiency.

Negative ionic states of tin in the oxide superconductor Sr$_{3-x}$SnO revealed by M\"{o}ssbauer spectroscopy