The electronic structure of Ag1-: XSn1+ xSe2 (x = 0.0, 0.1, 0.2, 0.25 and 1.0)

Takanori Wakita; Eugenio Paris; Kaya Kobayashi; Kensei Terashima; Muammer Yasin Hacisalihoǧlu; Teppei Ueno; Federica Bondino; Elena Magnano; Igor Píš; Luca Olivi; Jun Akimitsu; Yuji Muraoka; Takayoshi Yokoya; Naurang L. Saini

doi:10.1039/c7cp05369j

The electronic structure of Ag_{1-: X}Sn_{1+ x}Se₂ (x = 0.0, 0.1, 0.2, 0.25 and 1.0)

Takanori Wakita, Eugenio Paris, Kaya Kobayashi, Kensei Terashima, Muammer Yasin Hacisalihoǧlu, Teppei Ueno, Federica Bondino, Elena Magnano, Igor Píš, Luca Olivi, Jun Akimitsu, Yuji Muraoka, Takayoshi Yokoya, Naurang L. Saini

Research Institute for Interdisciplinary Science

Research output: Contribution to journal › Article

7 Citations (Scopus)

Abstract

We have studied the valence electronic structure of Ag_1-xSn_1+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 Se^2- and Se^2-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	https://doi.org/10.1039/c7cp05369j
Publication status	Published - 2017

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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Wakita, T., Paris, E., Kobayashi, K., Terashima, K., Hacisalihoǧlu, M. Y., Ueno, T., Bondino, F., Magnano, E., Píš, I., Olivi, L., Akimitsu, J., Muraoka, Y., Yokoya, T., & Saini, N. L. (2017). The electronic structure of Ag_{1-: X}Sn_{1+ x}Se₂ (x = 0.0, 0.1, 0.2, 0.25 and 1.0). Physical Chemistry Chemical Physics, 19(39), 26672-26678. https://doi.org/10.1039/c7cp05369j

The electronic structure of Ag_{1-: X}Sn_{1+ x}Se₂ (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

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. / The electronic structure of Ag_{1-: X}Sn_{1+ x}Se₂ (x = 0.0, 0.1, 0.2, 0.25 and 1.0). In: Physical Chemistry Chemical Physics. 2017 ; Vol. 19, No. 39. pp. 26672-26678.

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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.",

author = "Takanori Wakita and Eugenio Paris and Kaya Kobayashi and Kensei Terashima and Hacisalihoǧlu, {Muammer Yasin} and Teppei Ueno and Federica Bondino and Elena Magnano and Igor P{\'i}{\v s} and Luca Olivi and Jun Akimitsu and Yuji Muraoka and Takayoshi Yokoya and Saini, {Naurang L.}",

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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

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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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