Ru L3-edge XANES studies of A2RuO4 and ARuO3 (A = Ca, Sr, Ba) ruthenates

H. H. Wu; S. W. Chen; B. N. Lin; Y. Y. Hsu; J. F. Lee; L. Y. Jang; H. C. Ku

doi:10.1023/A:1023434017456

Ru L₃-edge XANES studies of A₂RuO₄ and ARuO₃ (A = Ca, Sr, Ba) ruthenates

H. H. Wu^*, S. W. Chen, B. N. Lin, Y. Y. Hsu, J. F. Lee, L. Y. Jang, H. C. Ku

^*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

Ru L₃-edge X-ray absorption near-edge structure (XANES) and magnetic studies for Ca₂RuO₄ antiferromagnetic insulator, Sr₂RuO₄ p-wave superconductor, CaRuO₃ exchange-enchange-enhanced paramagnetic metal, SrRuO₃ itinerant ferromagnetic metal and BaRuO₃ paramagnetic metal are compared. Although these compounds crystallized with different structural distortions, they possess similar RuO₆ octahedral environment where the Ru 4d orbitals are split into partially filled t_2g bands with four electrons and empty e_g bands. Two 2p_3/2-4d dipole transition peaks are observed with lower energy peak A for transition to unfilled t_2g states and the higher energy peak B to empty e_g states. The L₃-edge absorption intensity, shape and e_g-t_2g average band separation ΔE (B-A) is closely related to the variation of RuO₆ distortion, Ru-O d-p hybridization and unfilled Ru 4d band width.

Original language	English
Pages (from-to)	1193-1197
Number of pages	5
Journal	Journal of Low Temperature Physics
Volume	131
Issue number	5-6
DOIs	https://doi.org/10.1023/A:1023434017456
Publication status	Published - 2003 Jun
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

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@article{94b757d109854e239e4804dda8d078bc,

title = "Ru L3-edge XANES studies of A2RuO4 and ARuO3 (A = Ca, Sr, Ba) ruthenates",

abstract = "Ru L3-edge X-ray absorption near-edge structure (XANES) and magnetic studies for Ca2RuO4 antiferromagnetic insulator, Sr2RuO4 p-wave superconductor, CaRuO3 exchange-enchange-enhanced paramagnetic metal, SrRuO3 itinerant ferromagnetic metal and BaRuO3 paramagnetic metal are compared. Although these compounds crystallized with different structural distortions, they possess similar RuO6 octahedral environment where the Ru 4d orbitals are split into partially filled t2g bands with four electrons and empty eg bands. Two 2p3/2-4d dipole transition peaks are observed with lower energy peak A for transition to unfilled t2g states and the higher energy peak B to empty eg states. The L3-edge absorption intensity, shape and eg-t2g average band separation ΔE (B-A) is closely related to the variation of RuO6 distortion, Ru-O d-p hybridization and unfilled Ru 4d band width.",

author = "Wu, {H. H.} and Chen, {S. W.} and Lin, {B. N.} and Hsu, {Y. Y.} and Lee, {J. F.} and Jang, {L. Y.} and Ku, {H. C.}",

year = "2003",

month = jun,

doi = "10.1023/A:1023434017456",

language = "English",

volume = "131",

pages = "1193--1197",

journal = "Journal of Low Temperature Physics",

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publisher = "Springer New York",

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T1 - Ru L3-edge XANES studies of A2RuO4 and ARuO3 (A = Ca, Sr, Ba) ruthenates

AU - Wu, H. H.

AU - Chen, S. W.

AU - Lin, B. N.

AU - Hsu, Y. Y.

AU - Lee, J. F.

AU - Jang, L. Y.

AU - Ku, H. C.

PY - 2003/6

Y1 - 2003/6

N2 - Ru L3-edge X-ray absorption near-edge structure (XANES) and magnetic studies for Ca2RuO4 antiferromagnetic insulator, Sr2RuO4 p-wave superconductor, CaRuO3 exchange-enchange-enhanced paramagnetic metal, SrRuO3 itinerant ferromagnetic metal and BaRuO3 paramagnetic metal are compared. Although these compounds crystallized with different structural distortions, they possess similar RuO6 octahedral environment where the Ru 4d orbitals are split into partially filled t2g bands with four electrons and empty eg bands. Two 2p3/2-4d dipole transition peaks are observed with lower energy peak A for transition to unfilled t2g states and the higher energy peak B to empty eg states. The L3-edge absorption intensity, shape and eg-t2g average band separation ΔE (B-A) is closely related to the variation of RuO6 distortion, Ru-O d-p hybridization and unfilled Ru 4d band width.

AB - Ru L3-edge X-ray absorption near-edge structure (XANES) and magnetic studies for Ca2RuO4 antiferromagnetic insulator, Sr2RuO4 p-wave superconductor, CaRuO3 exchange-enchange-enhanced paramagnetic metal, SrRuO3 itinerant ferromagnetic metal and BaRuO3 paramagnetic metal are compared. Although these compounds crystallized with different structural distortions, they possess similar RuO6 octahedral environment where the Ru 4d orbitals are split into partially filled t2g bands with four electrons and empty eg bands. Two 2p3/2-4d dipole transition peaks are observed with lower energy peak A for transition to unfilled t2g states and the higher energy peak B to empty eg states. The L3-edge absorption intensity, shape and eg-t2g average band separation ΔE (B-A) is closely related to the variation of RuO6 distortion, Ru-O d-p hybridization and unfilled Ru 4d band width.

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Ru L₃-edge XANES studies of A₂RuO₄ and ARuO₃ (A = Ca, Sr, Ba) ruthenates

Abstract

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