Abstract
We have studied the valence electronic structure of Ag1-xSn1+xSe2 (x = 0.0, 0.1, 0.2, 0.25) and SnSe (x = 1.0) by a combined analysis of X-ray absorption spectroscopy (XAS) and X-ray photoemission spectroscopy (XPS) measurements. Both XAS and XPS reveal an increase in electron carriers in the system with x (i.e. excess Sn concentration) for 0 ≤ x ≤ 0.25. The core-level spectra (Sn 3d, Ag 3d and Se 3d) show that the charge state of Ag is almost 1+, while that of of Sn splits into Sn2+ and Sn4+ (providing clear evidence of valence skipping for the first time) with a concomitant splitting of Se into Se2- and Se2-δ states. The x dependence of the split components in Sn and Se together with the Se-K edge XAS reveals that the Se valence state may have an essential role in the transport properties of this system.
| Original language | English |
|---|---|
| Pages (from-to) | 26672-26678 |
| Number of pages | 7 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 19 |
| Issue number | 39 |
| DOIs | |
| Publication status | Published - 2017 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry
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The electronic structure of Ag1-: XSn1+ xSe2 (x = 0.0, 0.1, 0.2, 0.25 and 1.0). / Wakita, Takanori; Paris, Eugenio; Kobayashi, Kaya; Terashima, Kensei; Hacisalihoǧlu, Muammer Yasin; Ueno, Teppei; Bondino, Federica; Magnano, Elena; Píš, Igor; Olivi, Luca; Akimitsu, Jun; Muraoka, Yuji; Yokoya, Takayoshi; Saini, Naurang L.
In: Physical Chemistry Chemical Physics, Vol. 19, No. 39, 2017, p. 26672-26678.Research output: Contribution to journal › Article
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TY - JOUR
T1 - The electronic structure of Ag1-: XSn1+ xSe2 (x = 0.0, 0.1, 0.2, 0.25 and 1.0)
AU - Wakita, Takanori
AU - Paris, Eugenio
AU - Kobayashi, Kaya
AU - Terashima, Kensei
AU - Hacisalihoǧlu, Muammer Yasin
AU - Ueno, Teppei
AU - Bondino, Federica
AU - Magnano, Elena
AU - Píš, Igor
AU - Olivi, Luca
AU - Akimitsu, Jun
AU - Muraoka, Yuji
AU - Yokoya, Takayoshi
AU - Saini, Naurang L.
PY - 2017
Y1 - 2017
N2 - We have studied the valence electronic structure of Ag1-xSn1+xSe2 (x = 0.0, 0.1, 0.2, 0.25) and SnSe (x = 1.0) by a combined analysis of X-ray absorption spectroscopy (XAS) and X-ray photoemission spectroscopy (XPS) measurements. Both XAS and XPS reveal an increase in electron carriers in the system with x (i.e. excess Sn concentration) for 0 ≤ x ≤ 0.25. The core-level spectra (Sn 3d, Ag 3d and Se 3d) show that the charge state of Ag is almost 1+, while that of of Sn splits into Sn2+ and Sn4+ (providing clear evidence of valence skipping for the first time) with a concomitant splitting of Se into Se2- and Se2-δ states. The x dependence of the split components in Sn and Se together with the Se-K edge XAS reveals that the Se valence state may have an essential role in the transport properties of this system.
AB - We have studied the valence electronic structure of Ag1-xSn1+xSe2 (x = 0.0, 0.1, 0.2, 0.25) and SnSe (x = 1.0) by a combined analysis of X-ray absorption spectroscopy (XAS) and X-ray photoemission spectroscopy (XPS) measurements. Both XAS and XPS reveal an increase in electron carriers in the system with x (i.e. excess Sn concentration) for 0 ≤ x ≤ 0.25. The core-level spectra (Sn 3d, Ag 3d and Se 3d) show that the charge state of Ag is almost 1+, while that of of Sn splits into Sn2+ and Sn4+ (providing clear evidence of valence skipping for the first time) with a concomitant splitting of Se into Se2- and Se2-δ states. The x dependence of the split components in Sn and Se together with the Se-K edge XAS reveals that the Se valence state may have an essential role in the transport properties of this system.
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U2 - 10.1039/c7cp05369j
DO - 10.1039/c7cp05369j
M3 - Article
AN - SCOPUS:85031318938
VL - 19
SP - 26672
EP - 26678
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 39
ER -