A study of the electronic structure of FeSe1-xTex chalcogenides by Fe and Se K-edge x-ray absorption near edge structure measurements

B. Joseph; A. Iadecola; L. Simonelli; Y. Mizuguchi; Y. Takano; T. Mizokawa; N. L. Saini

doi:10.1088/0953-8984/22/48/485702

A study of the electronic structure of FeSe_1-xTe_x chalcogenides by Fe and Se K-edge x-ray absorption near edge structure measurements

B. Joseph^*, A. Iadecola, L. Simonelli, Y. Mizuguchi, Y. Takano, T. Mizokawa, N. L. Saini

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

53 Citations (Scopus)

Abstract

Fe K-edge and Se K-edge x-ray absorption near edge structure (XANES) measurements are used to study the FeSe_1-xTe_x electronic structure of chalcogenides. An intense Fe K-edge pre-edge peak due to Fe 1s →3d (and admixed Se/Te p states) is observed, showing substantial change with Te substitution and x-ray polarization. The main white line peak in the Se K-edge XANES due to Se 1s→ 4p transition appears similar to the one expected for Se^2- systems and changes with Te substitution. Polarization dependence reveals that unoccupied Se orbitals near the Fermi level have predominant p_x,y character. The results provide key information on the hybridization of Fe 3d and chalcogen p states in the Fe-based chalcogenide superconductors.

Original language	English
Article number	485702
Journal	Journal of Physics Condensed Matter
Volume	22
Issue number	48
DOIs	https://doi.org/10.1088/0953-8984/22/48/485702
Publication status	Published - 2010 Dec 8
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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title = "A study of the electronic structure of FeSe1-xTex chalcogenides by Fe and Se K-edge x-ray absorption near edge structure measurements",

abstract = "Fe K-edge and Se K-edge x-ray absorption near edge structure (XANES) measurements are used to study the FeSe1-xTex electronic structure of chalcogenides. An intense Fe K-edge pre-edge peak due to Fe 1s →3d (and admixed Se/Te p states) is observed, showing substantial change with Te substitution and x-ray polarization. The main white line peak in the Se K-edge XANES due to Se 1s→ 4p transition appears similar to the one expected for Se2- systems and changes with Te substitution. Polarization dependence reveals that unoccupied Se orbitals near the Fermi level have predominant px,y character. The results provide key information on the hybridization of Fe 3d and chalcogen p states in the Fe-based chalcogenide superconductors.",

author = "B. Joseph and A. Iadecola and L. Simonelli and Y. Mizuguchi and Y. Takano and T. Mizokawa and Saini, {N. L.}",

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T1 - A study of the electronic structure of FeSe1-xTex chalcogenides by Fe and Se K-edge x-ray absorption near edge structure measurements

AU - Joseph, B.

AU - Iadecola, A.

AU - Simonelli, L.

AU - Mizuguchi, Y.

AU - Takano, Y.

AU - Mizokawa, T.

AU - Saini, N. L.

PY - 2010/12/8

Y1 - 2010/12/8

N2 - Fe K-edge and Se K-edge x-ray absorption near edge structure (XANES) measurements are used to study the FeSe1-xTex electronic structure of chalcogenides. An intense Fe K-edge pre-edge peak due to Fe 1s →3d (and admixed Se/Te p states) is observed, showing substantial change with Te substitution and x-ray polarization. The main white line peak in the Se K-edge XANES due to Se 1s→ 4p transition appears similar to the one expected for Se2- systems and changes with Te substitution. Polarization dependence reveals that unoccupied Se orbitals near the Fermi level have predominant px,y character. The results provide key information on the hybridization of Fe 3d and chalcogen p states in the Fe-based chalcogenide superconductors.

AB - Fe K-edge and Se K-edge x-ray absorption near edge structure (XANES) measurements are used to study the FeSe1-xTex electronic structure of chalcogenides. An intense Fe K-edge pre-edge peak due to Fe 1s →3d (and admixed Se/Te p states) is observed, showing substantial change with Te substitution and x-ray polarization. The main white line peak in the Se K-edge XANES due to Se 1s→ 4p transition appears similar to the one expected for Se2- systems and changes with Te substitution. Polarization dependence reveals that unoccupied Se orbitals near the Fermi level have predominant px,y character. The results provide key information on the hybridization of Fe 3d and chalcogen p states in the Fe-based chalcogenide superconductors.

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A study of the electronic structure of FeSe_1-xTe_x chalcogenides by Fe and Se K-edge x-ray absorption near edge structure measurements

Abstract

ASJC Scopus subject areas

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