標題: Orbital symmetry and electron correlation in NaxCoO2
作者: Wu, WB
Huang, DJ
Okamoto, J
Lin, HJ
Chou, FC
Chen, CT
電子物理學系
Department of Electrophysics
關鍵字: orbital polarization;soft X-ray absorption
公開日期: 1-五月-2006
摘要: We present measurements of polarization-dependent soft X-ray absorption on NaxCoO2. The results reveal that the electronic states determining the low-energy excitations of NaxCoO2 have predominantly a(1g) symmetry with significant O 2p character. A large transfer of spectral weight observed in O 1s X-ray absorption provides spectral evidence for strong electron correlations in NaxCoO2 with the Na doping higher than half. For the Na concentration less than half, our measurements of O 1s absorption suggest that Na2CoO2 exhibits band-like electronic character. (c) 2006 Published by Elsevier B.V.
URI: http://dx.doi.org/10.1016/j.physb.2006.01.320
http://hdl.handle.net/11536/12339
ISSN: 0921-4526
DOI: 10.1016/j.physb.2006.01.320
期刊: PHYSICA B-CONDENSED MATTER
Volume: 378-80
Issue: 
起始頁: 867
結束頁: 868
顯示於類別:會議論文


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  1. 000238426600377.pdf