Hard-X-ray photoelectron spectroscopy of NaxCoO 2.yH2O

Ashish Atma Chainani, T. Yokoya, Y. Takata, K. Tamasaku, M. Taguchi, T. Shimojima, N. Kamakura, K. Horiba, S. Tsuda, S. Shin, D. Miwa, Y. Nishino, T. Ishikawa, M. Yabashi, K. Kobayashi, H. Namatame, M. Taniguchi, K. Takada, T. Sasaki, H. SakuraiE. Takayama-Muromachi

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

We study the bulk electronic structure of NaxCoO2.yH2O using Hard X-ray (HX, hν = 5.95 KeV) synchrotron photoelectron spectroscopy (PES). The Co 2p core level spectra show well-separated Co3+ and Co4+ ions. Cluster calculations suggest low spin Co3+ and Co4+ character, and a moderate on-site Coulomb correlation energy Udd∼3-5.5 eV. Photon-dependent valence band PES identifies Co 3d and O 2p derived states, in near agreement with band structure calculations. We discuss the importance of HX-PES for studying correlated transition metal oxides.

Original languageEnglish
Pages (from-to)163-168
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume547
Issue number1
DOIs
Publication statusPublished - 2005 Jul 21
EventProceedings of the Workshop on Hard X-Ray Photoelectron Spectroscopy HAXPES -
Duration: 2004 Sep 112004 Sep 12

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Photoelectron spectroscopy
X ray photoelectron spectroscopy
photoelectron spectroscopy
x rays
Core levels
Valence bands
Synchrotrons
Band structure
Electronic structure
Transition metals
metal oxides
synchrotrons
Photons
transition metals
electronic structure
valence
X rays
Oxides
Ions
photons

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

Chainani, Ashish Atma ; Yokoya, T. ; Takata, Y. ; Tamasaku, K. ; Taguchi, M. ; Shimojima, T. ; Kamakura, N. ; Horiba, K. ; Tsuda, S. ; Shin, S. ; Miwa, D. ; Nishino, Y. ; Ishikawa, T. ; Yabashi, M. ; Kobayashi, K. ; Namatame, H. ; Taniguchi, M. ; Takada, K. ; Sasaki, T. ; Sakurai, H. ; Takayama-Muromachi, E. / Hard-X-ray photoelectron spectroscopy of NaxCoO 2.yH2O. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2005 ; Vol. 547, No. 1. pp. 163-168.
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title = "Hard-X-ray photoelectron spectroscopy of NaxCoO 2.yH2O",
abstract = "We study the bulk electronic structure of NaxCoO2.yH2O using Hard X-ray (HX, hν = 5.95 KeV) synchrotron photoelectron spectroscopy (PES). The Co 2p core level spectra show well-separated Co3+ and Co4+ ions. Cluster calculations suggest low spin Co3+ and Co4+ character, and a moderate on-site Coulomb correlation energy Udd∼3-5.5 eV. Photon-dependent valence band PES identifies Co 3d and O 2p derived states, in near agreement with band structure calculations. We discuss the importance of HX-PES for studying correlated transition metal oxides.",
author = "Chainani, {Ashish Atma} and T. Yokoya and Y. Takata and K. Tamasaku and M. Taguchi and T. Shimojima and N. Kamakura and K. Horiba and S. Tsuda and S. Shin and D. Miwa and Y. Nishino and T. Ishikawa and M. Yabashi and K. Kobayashi and H. Namatame and M. Taniguchi and K. Takada and T. Sasaki and H. Sakurai and E. Takayama-Muromachi",
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Chainani, AA, Yokoya, T, Takata, Y, Tamasaku, K, Taguchi, M, Shimojima, T, Kamakura, N, Horiba, K, Tsuda, S, Shin, S, Miwa, D, Nishino, Y, Ishikawa, T, Yabashi, M, Kobayashi, K, Namatame, H, Taniguchi, M, Takada, K, Sasaki, T, Sakurai, H & Takayama-Muromachi, E 2005, 'Hard-X-ray photoelectron spectroscopy of NaxCoO 2.yH2O', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 547, no. 1, pp. 163-168. https://doi.org/10.1016/j.nima.2005.05.021

Hard-X-ray photoelectron spectroscopy of NaxCoO 2.yH2O. / Chainani, Ashish Atma; Yokoya, T.; Takata, Y.; Tamasaku, K.; Taguchi, M.; Shimojima, T.; Kamakura, N.; Horiba, K.; Tsuda, S.; Shin, S.; Miwa, D.; Nishino, Y.; Ishikawa, T.; Yabashi, M.; Kobayashi, K.; Namatame, H.; Taniguchi, M.; Takada, K.; Sasaki, T.; Sakurai, H.; Takayama-Muromachi, E.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 547, No. 1, 21.07.2005, p. 163-168.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Hard-X-ray photoelectron spectroscopy of NaxCoO 2.yH2O

AU - Chainani, Ashish Atma

AU - Yokoya, T.

AU - Takata, Y.

AU - Tamasaku, K.

AU - Taguchi, M.

AU - Shimojima, T.

AU - Kamakura, N.

AU - Horiba, K.

AU - Tsuda, S.

AU - Shin, S.

AU - Miwa, D.

AU - Nishino, Y.

AU - Ishikawa, T.

AU - Yabashi, M.

AU - Kobayashi, K.

AU - Namatame, H.

AU - Taniguchi, M.

AU - Takada, K.

AU - Sasaki, T.

AU - Sakurai, H.

AU - Takayama-Muromachi, E.

PY - 2005/7/21

Y1 - 2005/7/21

N2 - We study the bulk electronic structure of NaxCoO2.yH2O using Hard X-ray (HX, hν = 5.95 KeV) synchrotron photoelectron spectroscopy (PES). The Co 2p core level spectra show well-separated Co3+ and Co4+ ions. Cluster calculations suggest low spin Co3+ and Co4+ character, and a moderate on-site Coulomb correlation energy Udd∼3-5.5 eV. Photon-dependent valence band PES identifies Co 3d and O 2p derived states, in near agreement with band structure calculations. We discuss the importance of HX-PES for studying correlated transition metal oxides.

AB - We study the bulk electronic structure of NaxCoO2.yH2O using Hard X-ray (HX, hν = 5.95 KeV) synchrotron photoelectron spectroscopy (PES). The Co 2p core level spectra show well-separated Co3+ and Co4+ ions. Cluster calculations suggest low spin Co3+ and Co4+ character, and a moderate on-site Coulomb correlation energy Udd∼3-5.5 eV. Photon-dependent valence band PES identifies Co 3d and O 2p derived states, in near agreement with band structure calculations. We discuss the importance of HX-PES for studying correlated transition metal oxides.

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U2 - 10.1016/j.nima.2005.05.021

DO - 10.1016/j.nima.2005.05.021

M3 - Conference article

AN - SCOPUS:22144462136

VL - 547

SP - 163

EP - 168

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

SN - 0168-9002

IS - 1

ER -