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.
| Original language | English |
|---|---|
| Article number | 180508 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 69 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - May 2004 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Bulk electronic structure of Na0.35CoO2·1. 3H2O. / Chainani, A.; Yokoya, Takayoshi; 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.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Bulk electronic structure of Na0.35CoO2·1. 3H2O
AU - Chainani, A.
AU - Yokoya, Takayoshi
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
Y1 - 2004/5
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=42749107709&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=42749107709&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.69.180508
DO - 10.1103/PhysRevB.69.180508
M3 - Article
AN - SCOPUS:42749107709
VL - 69
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 18
M1 - 180508
ER -