Electronic structure of proton conducting SrCeO3–SrZrO3 thin films

Hydrogen separation using proton-conducting perovskites

“…The partial pressures of hydrogen in the Ar sweep gas, p(H 2 , perm) was determined by gas chromatography. X-ray absorption spectroscopy (XAS) [26,27] was employed to estimate the electronic charge carrier. Since this technique elucidates unoccupied density of states of electron holes, unoccupied states in the valence band, can be detected.…”

“…In order to estimate if electron holes or conduction electrons are responsible for the electronic conduction, soft X-ray absorption spectroscopy (XAS) was employed, expecting that the electron hole can be observed by this technique [26,27]. Fig.…”

Electronic structure of protonic conductor SrCeO3 by soft-X-ray spectroscopy

“…4 shows the O 1s XAS spectra of wet-annealed SrCe 1Àx Y x O 3Àd (x=0, 0.05). From the dipole selection rule, it is understood that the O 1s XAS spectra of Ce oxides correspond to the transition from O 1s character to O 2p character hybridized with unoccupied Ce 4f states [15][16][17]. The O 1s XAS spectra are normalized by the Sr 4d peak of the conduction band, though the peak is not known in this figure.…”

“…On the other hand, XAS is related directly to the unoccupied state. The XAS gives the spectrum relating to the site-and symmetry-selected density-of-state (DOS) [14][15][16][17]. Therefore, XAS is a powerful tool for the study of electronic structure in the band gap energy region and to relate it to the transport properties.…”

Investigation of the electronic structure in Eu1?xDyxTiO3 by means of soft X-ray absorption spectroscopy

“…Among such systems, perovskite titanates have been extensively studied in terms of their application to oxide-ion conductors, piezoelectric materials, and transistors [1][2][3][4]. On the other hand, from the point of view of a fundamental study, the magnetic and transport properties of LnTiO 3 are very interesting.…”