Soft- and Hard-X-ray Photoemission Spectroscopy of La2-2xSr1+2xMn2O7
Soft- and Hard-X-ray Photoemission Spectroscopy of La2-2xSr1+2xMn2O7
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La2-2xSr1 2xMn2O7 的软和硬 X 射线光电发射光谱
DOI：
10.1143/jpsjs.81sb.sb069
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Y. Tokura and S. Suga
中科院分区：
文献类型：
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作者：
H. Fujiwara;A. Sekiyama;H. Sugiyama;G. Funabashi;T. Muro;A. Higashiya;M. Yabashi;K. Tamasaku;T. Ishikawa;S. Miyasaka;H. Nakamura;T. Kimura;Y. Tokura and S. Suga
我们测量了La2-2xSr1+2xMn2O7(x=0.38，0.40)双层锰氧化物的光电子能谱，其光子能量(hν)分别为640-700和8150 eV。在ν=700eV的价带谱和Sr3dc能级的极角依赖关系中，揭示了表面电子结构和体电子结构的差异。此外，我们还利用ν∼643 eV的Mn2p-3化妆光电子能谱和8175 eV光子的硬X射线光电子能谱，再次证实了即使在体电子态，费米能级的能谱重量也受到了抑制。
We have performed the photoemission spectroscopy of the bilayered manganese oxides La2-2xSr1+2xMn2O7(x= 0.38, 0.40) with the photon energies (hν) of 640–700 and 8150 eV. The difference between the surface and the bulk electronic structures is revealed from the polar-angle dependence of the Sr 3dcore level and the valence band spectra withhν=700 eV. Moreover, we have reconfirmed that the spectral weight at the Fermi level is suppressed even in the bulk electronic states by means of the valence band spectra obtained by the Mn 2p–3dresonant photoemission withhν∼643 eV and by the hard-X-ray photoemission spectroscopy with 8175 eV photons.