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

A. 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. Sakurai; E. Takayama-Muromachi

doi:10.1016/j.nima.2005.05.021

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

A. 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 journal › Conference article › peer-review

5 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 language	English
Pages (from-to)	163-168
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	547
Issue number	1
DOIs	https://doi.org/10.1016/j.nima.2005.05.021
Publication status	Published - Jul 21 2005
Externally published	Yes
Event	Proceedings of the Workshop on Hard X-Ray Photoelectron Spectroscopy HAXPES - Duration: Sept 11 2004 → Sept 12 2004

Keywords

Cobaltates
Correlated electrons
Hard X-ray photoelectron spectroscopy
Superconductivity

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/j.nima.2005.05.021

Cite this

Chainani, A., 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., ... Takayama-Muromachi, E. (2005). Hard-X-ray photoelectron spectroscopy of Na_xCoO ₂.yH₂O. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 547(1), 163-168. https://doi.org/10.1016/j.nima.2005.05.021

Chainani, A, 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 Na_xCoO 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

@article{584f5b8836e045c0ad6a42d1f6e0c5ea,

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.",

keywords = "Cobaltates, Correlated electrons, Hard X-ray photoelectron spectroscopy, Superconductivity",

author = "A. Chainani 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",

year = "2005",

month = jul,

day = "21",

doi = "10.1016/j.nima.2005.05.021",

language = "English",

volume = "547",

pages = "163--168",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier",

number = "1",

note = "Proceedings of the Workshop on Hard X-Ray Photoelectron Spectroscopy HAXPES ; Conference date: 11-09-2004 Through 12-09-2004",

}

TY - JOUR

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

AU - Chainani, A.

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.

KW - Cobaltates

KW - Correlated electrons

KW - Hard X-ray photoelectron spectroscopy

KW - Superconductivity

UR - http://www.scopus.com/inward/record.url?scp=22144462136&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=22144462136&partnerID=8YFLogxK

U2 - 10.1016/j.nima.2005.05.021

DO - 10.1016/j.nima.2005.05.021

M3 - Conference article

AN - SCOPUS:22144462136

SN - 0168-9002

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

IS - 1

T2 - Proceedings of the Workshop on Hard X-Ray Photoelectron Spectroscopy HAXPES

Y2 - 11 September 2004 through 12 September 2004

ER -