Low-energy excitations in NaxCoO2 · yH2O: Experiments and simulation

P. Leininger, J. P. Rueff, M. Four, G. Vankó, H. Iishi, A. Yaresko, J. M. Mariot

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We report on resonant inelastic X-ray scattering measurements on Na0.7CoO2 and on the corresponding hydrated compound Na0.35CoO2 · yH2O at the Co K-edge. The spectra exhibit a single excitation at 10 eV energy transfer which resonates at the energy of the Co K white line. The experimental results are analyzed within the linear muffin-tin orbital approach and compared to the calculated electronic density of states and optical conductivity spectra. The poor agreement between calculations and experiment is attributed to effective screening effects from electrons in the Fermi sea. The 10 eV feature can be tentatively attributed to a charge transfer excited state, or more likely to a damped plasmon mode.

Original languageEnglish
Pages (from-to)165-169
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume246
Issue number1
DOIs
Publication statusPublished - May 2006

Fingerprint

Optical conductivity
Inelastic scattering
Electronic density of states
Tin
Excitation energy
X ray scattering
Excited states
Energy transfer
Charge transfer
Screening
Electrons
excitation
tin
screening
simulation
Experiments
energy transfer
charge transfer
orbitals
conductivity

Keywords

  • Electronic correlation
  • NaCoO
  • RIXS
  • Superconductor

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Instrumentation
  • Surfaces and Interfaces

Cite this

Low-energy excitations in NaxCoO2 · yH2O : Experiments and simulation. / Leininger, P.; Rueff, J. P.; Four, M.; Vankó, G.; Iishi, H.; Yaresko, A.; Mariot, J. M.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 246, No. 1, 05.2006, p. 165-169.

Research output: Contribution to journalArticle

Leininger, P. ; Rueff, J. P. ; Four, M. ; Vankó, G. ; Iishi, H. ; Yaresko, A. ; Mariot, J. M. / Low-energy excitations in NaxCoO2 · yH2O : Experiments and simulation. In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2006 ; Vol. 246, No. 1. pp. 165-169.
@article{9269d1a24adb441eb0d87967b376e160,
title = "Low-energy excitations in NaxCoO2 · yH2O: Experiments and simulation",
abstract = "We report on resonant inelastic X-ray scattering measurements on Na0.7CoO2 and on the corresponding hydrated compound Na0.35CoO2 · yH2O at the Co K-edge. The spectra exhibit a single excitation at 10 eV energy transfer which resonates at the energy of the Co K white line. The experimental results are analyzed within the linear muffin-tin orbital approach and compared to the calculated electronic density of states and optical conductivity spectra. The poor agreement between calculations and experiment is attributed to effective screening effects from electrons in the Fermi sea. The 10 eV feature can be tentatively attributed to a charge transfer excited state, or more likely to a damped plasmon mode.",
keywords = "Electronic correlation, NaCoO, RIXS, Superconductor",
author = "P. Leininger and Rueff, {J. P.} and M. Four and G. Vank{\'o} and H. Iishi and A. Yaresko and Mariot, {J. M.}",
year = "2006",
month = "5",
doi = "10.1016/j.nimb.2005.12.026",
language = "English",
volume = "246",
pages = "165--169",
journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",
issn = "0168-583X",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Low-energy excitations in NaxCoO2 · yH2O

T2 - Experiments and simulation

AU - Leininger, P.

AU - Rueff, J. P.

AU - Four, M.

AU - Vankó, G.

AU - Iishi, H.

AU - Yaresko, A.

AU - Mariot, J. M.

PY - 2006/5

Y1 - 2006/5

N2 - We report on resonant inelastic X-ray scattering measurements on Na0.7CoO2 and on the corresponding hydrated compound Na0.35CoO2 · yH2O at the Co K-edge. The spectra exhibit a single excitation at 10 eV energy transfer which resonates at the energy of the Co K white line. The experimental results are analyzed within the linear muffin-tin orbital approach and compared to the calculated electronic density of states and optical conductivity spectra. The poor agreement between calculations and experiment is attributed to effective screening effects from electrons in the Fermi sea. The 10 eV feature can be tentatively attributed to a charge transfer excited state, or more likely to a damped plasmon mode.

AB - We report on resonant inelastic X-ray scattering measurements on Na0.7CoO2 and on the corresponding hydrated compound Na0.35CoO2 · yH2O at the Co K-edge. The spectra exhibit a single excitation at 10 eV energy transfer which resonates at the energy of the Co K white line. The experimental results are analyzed within the linear muffin-tin orbital approach and compared to the calculated electronic density of states and optical conductivity spectra. The poor agreement between calculations and experiment is attributed to effective screening effects from electrons in the Fermi sea. The 10 eV feature can be tentatively attributed to a charge transfer excited state, or more likely to a damped plasmon mode.

KW - Electronic correlation

KW - NaCoO

KW - RIXS

KW - Superconductor

UR - http://www.scopus.com/inward/record.url?scp=33645880145&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645880145&partnerID=8YFLogxK

U2 - 10.1016/j.nimb.2005.12.026

DO - 10.1016/j.nimb.2005.12.026

M3 - Article

AN - SCOPUS:33645880145

VL - 246

SP - 165

EP - 169

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

SN - 0168-583X

IS - 1

ER -