The low-temperature phase-transition of silver oxide (Ag2O) has been investigated by extended x-ray absorption fine structure (EXAFS) spectroscopy as a function of temperature.The thermal evolution of the local structure around Ag atoms has been determined. In particular, below the phase-transition temperatureat ∼35 K, a progressive splitting of the Ag–Ag next-nearest-neighbor distances is observed. This definitely supports the idea that the phase-transition of Ag2O is due to displacive disorder of the Ag atoms.
Displacive phase-transition of cuprite Ag2O revealed by extended x-ray absorption fine structure
SANSON, ANDREA
2016
Abstract
The low-temperature phase-transition of silver oxide (Ag2O) has been investigated by extended x-ray absorption fine structure (EXAFS) spectroscopy as a function of temperature.The thermal evolution of the local structure around Ag atoms has been determined. In particular, below the phase-transition temperatureat ∼35 K, a progressive splitting of the Ag–Ag next-nearest-neighbor distances is observed. This definitely supports the idea that the phase-transition of Ag2O is due to displacive disorder of the Ag atoms.File in questo prodotto:
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