Bulk electronic structure of Na0.35CoO2·1. 3H2O

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:10.1103/PhysRevB.69.180508

Bulk electronic structure of Na_0.35CoO₂·1. 3H₂O

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 Institute for Interdisciplinary Science

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

48 Citations (Scopus)

Abstract

High-energy (hv = 5.95 keV) synchrotron photoemission spectroscopy (PES) is used to study bulk electronic structure of Na_0.35CoO₂ · 1.3H₂O, the layered superconductor. In contrast to three-dimensional doped Co oxides, 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 U_dd∼3-5.5 eV. Photon dependent valence band PES identifies Co 3d and O 2p derived states, in near agreement with band-structure calculations.

Original language	English
Article number	180508
Pages (from-to)	180508-1-180508-4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	69
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.69.180508
Publication status	Published - May 2004

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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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. (2004). Bulk electronic structure of Na_0.35CoO₂·1. 3H₂O. Physical Review B - Condensed Matter and Materials Physics, 69(18), 180508-1-180508-4. [180508]. https://doi.org/10.1103/PhysRevB.69.180508

Bulk electronic structure of Na_0.35CoO₂·1. 3H₂O. / 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.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 69, No. 18, 180508, 05.2004, p. 180508-1-180508-4.

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

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 2004, 'Bulk electronic structure of Na_0.35CoO₂·1. 3H₂O', Physical Review B - Condensed Matter and Materials Physics, vol. 69, no. 18, 180508, pp. 180508-1-180508-4. https://doi.org/10.1103/PhysRevB.69.180508

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. / Bulk electronic structure of Na_0.35CoO₂·1. 3H₂O. In: Physical Review B - Condensed Matter and Materials Physics. 2004 ; Vol. 69, No. 18. pp. 180508-1-180508-4.

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abstract = "High-energy (hv = 5.95 keV) synchrotron photoemission spectroscopy (PES) is used to study bulk electronic structure of Na0.35CoO2 · 1.3H2O, the layered superconductor. In contrast to three-dimensional doped Co oxides, 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.",

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",

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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 - 2004/5

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AB - High-energy (hv = 5.95 keV) synchrotron photoemission spectroscopy (PES) is used to study bulk electronic structure of Na0.35CoO2 · 1.3H2O, the layered superconductor. In contrast to three-dimensional doped Co oxides, 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.

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