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Title: Resonant inelastic x-ray scattering study of charge excitations in superconducting and nonsuperconducting PrFeAsO₁₋ y

Abstract

We report the first observation by momentum-resolved resonant inelastic x-ray scattering of charge excitations in an iron-based superconductor and its parent compound, PrFeAsO₀.₇ and PrFeAsO, respectively, with two main results. First, using calculations based on a 16-band dp model, we show that the energy of the lowest-lying excitations, identified as dd interband transitions of dominant xz,yz orbital character, exhibits a dramatic dependence on electron correlation. This enables us to estimate the Coulomb repulsion U and Hund's coupling J, and to highlight the role played by J in these peculiar orbital-dependent electron correlation effects. Second, we show that short-range antiferromagnetic correlations, which are a prerequisite to the occurrence of these excitations at the Γ point, are still present in the superconducting state.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1103249
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Volume: 86 Journal Issue: 11; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Jarrige, I., Nomura, T., Ishii, K., Gretarsson, H., Kim, Y.-J., Kim, J., Upton, M., Casa, D., Gog, T., Ishikado, M., Fukuda, T., Yoshida, M., Hill, J. P., Liu, X., Hiraoka, N., Tsuei, K. D., and Shamoto, S. Resonant inelastic x-ray scattering study of charge excitations in superconducting and nonsuperconducting PrFeAsO₁₋y. United States: N. p., 2012. Web. doi:10.1103/PhysRevB.86.115104.
Jarrige, I., Nomura, T., Ishii, K., Gretarsson, H., Kim, Y.-J., Kim, J., Upton, M., Casa, D., Gog, T., Ishikado, M., Fukuda, T., Yoshida, M., Hill, J. P., Liu, X., Hiraoka, N., Tsuei, K. D., & Shamoto, S. Resonant inelastic x-ray scattering study of charge excitations in superconducting and nonsuperconducting PrFeAsO₁₋y. United States. doi:10.1103/PhysRevB.86.115104.
Jarrige, I., Nomura, T., Ishii, K., Gretarsson, H., Kim, Y.-J., Kim, J., Upton, M., Casa, D., Gog, T., Ishikado, M., Fukuda, T., Yoshida, M., Hill, J. P., Liu, X., Hiraoka, N., Tsuei, K. D., and Shamoto, S. Wed . "Resonant inelastic x-ray scattering study of charge excitations in superconducting and nonsuperconducting PrFeAsO₁₋y". United States. doi:10.1103/PhysRevB.86.115104.
@article{osti_1103249,
title = {Resonant inelastic x-ray scattering study of charge excitations in superconducting and nonsuperconducting PrFeAsO₁₋y},
author = {Jarrige, I. and Nomura, T. and Ishii, K. and Gretarsson, H. and Kim, Y.-J. and Kim, J. and Upton, M. and Casa, D. and Gog, T. and Ishikado, M. and Fukuda, T. and Yoshida, M. and Hill, J. P. and Liu, X. and Hiraoka, N. and Tsuei, K. D. and Shamoto, S.},
abstractNote = {We report the first observation by momentum-resolved resonant inelastic x-ray scattering of charge excitations in an iron-based superconductor and its parent compound, PrFeAsO₀.₇ and PrFeAsO, respectively, with two main results. First, using calculations based on a 16-band dp model, we show that the energy of the lowest-lying excitations, identified as dd interband transitions of dominant xz,yz orbital character, exhibits a dramatic dependence on electron correlation. This enables us to estimate the Coulomb repulsion U and Hund's coupling J, and to highlight the role played by J in these peculiar orbital-dependent electron correlation effects. Second, we show that short-range antiferromagnetic correlations, which are a prerequisite to the occurrence of these excitations at the Γ point, are still present in the superconducting state.},
doi = {10.1103/PhysRevB.86.115104},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 11,
volume = 86,
place = {United States},
year = {2012},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevB.86.115104

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Cited by: 7 works
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