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ID 19352
本文ファイル
著者
Eguchi, Ritsuko
Kiss, Takayuki
Tsuda, Shunsuke
Shimojima, Takahiro
Mizokami, Tomohiro
Yokoya, Takayoshi
Chainani, Ashish
Shin, Shik
Inoue, Isao H.
Togashi, Tadashi
Watanabe, Shuntaro
Zhang, C. Q.
Chen, C. T.
Arita, Masashi
キーワード
photoemission
binding energy
photoelectron spectra
strontium compounds
calcium compounds
electronic density of states
Fermi level
strongly correlated electron systems
抄録(英)
We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with bulk and surface-sensitive high-resolution photoemission spectroscopy, using a vacuum ultraviolet laser, synchrotron radiation, and a discharge lamp (hν=7–21 eV). A systematic suppression of the density of states (DOS) within ~0.2 eV of the Fermi level (EF) is found on decreasing photon energy, i.e., on increasing bulk sensitivity. The coherent band in SrVO3 and CaVO3 is shown to consist of surface and bulk-derived features, separated in energy. The stronger distortion on surface of CaVO3 compared to SrVO3 leads to a higher surface metallicity in the coherent DOS at EF, consistent with recent theory.
掲載誌名
Physical Review Letters
96巻
7号
開始ページ
076402-1
終了ページ
076402-4
出版年月日
2006-02-23
出版者
American Physical Society
ISSN
0031-9007
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2006 The American Physical Society.
関連情報URL
部局名
理学研究科
放射光科学研究センター