Bulk electronic structure of Na0.35CoO2•1.3H2O -: art. no. 180508

被引：45

作者：

Chainani, A ^{[1
]}

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

机构：

[1] RIKEN SPring 8 Ctr, Soft Xray Spect Lab, 1-1-1 Kouto, Mikazuki, Hyogo 6795148, Japan

[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[3] RIKEN SPring 8 Ctr, Coherent Xray Opt Lab, Mikazuki, Hyogo 6795148, Japan

[4] JASRISPring8, Mikazuki, Hyogo 6795198, Japan

[5] Hiroshima Univ, HiSOR, Higashihiroshima 7398526, Japan

[6] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[7] Natl Inst Mat Sci, Saitama 3320012, Japan

[8] Japan Sci & Technol Corp, CREST, Tsukuba, Ibaraki, Japan

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.69.180508

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-energy (hnu=5.95 keV) synchrotron photoemission spectroscopy (PES) is used to study bulk electronic structure of Na0.35CoO2.1.3H(2)O, 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)similar to3-5.5 eV. Photon dependent valence band PES identifies Co 3d and O 2p derived states, in near agreement with band-structure calculations.

引用

页码：180508 / 1

页数：4

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