Temperature dependent Re L3-edge X-ray absorption study of crystalline rhenium trioxide ReO3

A. Kuzmin; J. Purans; G. Dalba; P. Fornasini; F. Rocca

doi:10.1051/jp4:19972152

Temperature dependent Re L₃-edge X-ray absorption study of crystalline rhenium trioxide ReO₃

A. Kuzmin^*
, J. Purans
, G. Dalba
, P. Fornasini
, F. Rocca

^*Corresponding author for this work

University of Trento
National Research Council of Italy

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

10 Citations (Scopus)

Abstract

X-ray absorption spectroscopy study of crystalline ReO₃ was performed at the Re L₃-edge in the temperature interval from 77 to 670 K. The analysis of both XANES and EXAFS regions shows that in ReO₃, a progressive localization of the 5d states following the temperature increase is accompanied at T > 350 K by a distortion of the ReO₆ octahedra. The distortion increases continuously up to the ReO₃ decomposition temperature T_d ≈ 673 K and leads to the lowering of the rhenium site symmetry from O_h (T ≤ 350 K) → D_4h, (T ≈ 513 K) → C_4v (T ≈ 668 K). The observed distortion is explained by (i) the strong electron-phonon coupling of the 5d electron with the M₃ and M′₃^Z phonons and (ii) the Jahn-Teller-like effect caused by the rhenium 5d¹ electron which becomes localized at high temperature.

Original language	English
Pages (from-to)	C2-1119-C2-1120
Journal	Journal De Physique. IV : JP
Volume	7
Issue number	2 Part 2
DOIs	https://doi.org/10.1051/jp4:19972152
Publication status	Published - 1997

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title = "Temperature dependent Re L3-edge X-ray absorption study of crystalline rhenium trioxide ReO3",

abstract = "X-ray absorption spectroscopy study of crystalline ReO3 was performed at the Re L3-edge in the temperature interval from 77 to 670 K. The analysis of both XANES and EXAFS regions shows that in ReO3, a progressive localization of the 5d states following the temperature increase is accompanied at T > 350 K by a distortion of the ReO6 octahedra. The distortion increases continuously up to the ReO3 decomposition temperature Td ≈ 673 K and leads to the lowering of the rhenium site symmetry from Oh (T ≤ 350 K) → D4h, (T ≈ 513 K) → C4v (T ≈ 668 K). The observed distortion is explained by (i) the strong electron-phonon coupling of the 5d electron with the M3 and M′3Z phonons and (ii) the Jahn-Teller-like effect caused by the rhenium 5d1 electron which becomes localized at high temperature.",

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T1 - Temperature dependent Re L3-edge X-ray absorption study of crystalline rhenium trioxide ReO3

AU - Kuzmin, A.

AU - Purans, J.

AU - Dalba, G.

AU - Fornasini, P.

AU - Rocca, F.

PY - 1997

Y1 - 1997

N2 - X-ray absorption spectroscopy study of crystalline ReO3 was performed at the Re L3-edge in the temperature interval from 77 to 670 K. The analysis of both XANES and EXAFS regions shows that in ReO3, a progressive localization of the 5d states following the temperature increase is accompanied at T > 350 K by a distortion of the ReO6 octahedra. The distortion increases continuously up to the ReO3 decomposition temperature Td ≈ 673 K and leads to the lowering of the rhenium site symmetry from Oh (T ≤ 350 K) → D4h, (T ≈ 513 K) → C4v (T ≈ 668 K). The observed distortion is explained by (i) the strong electron-phonon coupling of the 5d electron with the M3 and M′3Z phonons and (ii) the Jahn-Teller-like effect caused by the rhenium 5d1 electron which becomes localized at high temperature.

AB - X-ray absorption spectroscopy study of crystalline ReO3 was performed at the Re L3-edge in the temperature interval from 77 to 670 K. The analysis of both XANES and EXAFS regions shows that in ReO3, a progressive localization of the 5d states following the temperature increase is accompanied at T > 350 K by a distortion of the ReO6 octahedra. The distortion increases continuously up to the ReO3 decomposition temperature Td ≈ 673 K and leads to the lowering of the rhenium site symmetry from Oh (T ≤ 350 K) → D4h, (T ≈ 513 K) → C4v (T ≈ 668 K). The observed distortion is explained by (i) the strong electron-phonon coupling of the 5d electron with the M3 and M′3Z phonons and (ii) the Jahn-Teller-like effect caused by the rhenium 5d1 electron which becomes localized at high temperature.

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JO - Journal De Physique. IV : JP

JF - Journal De Physique. IV : JP

IS - 2 Part 2

ER -

Temperature dependent Re L₃-edge X-ray absorption study of crystalline rhenium trioxide ReO₃

Abstract

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