The Ba 4d–4f giant dipole resonance in complex Ba/Si compounds
The Ba 4d–4f giant dipole resonance in complex Ba/Si compounds
复制标题
复杂 Ba/Si 化合物中的 Ba 4dâ4f 巨偶极共振
DOI:
10.1088/0953-4075/47/4/045102
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
M. Tolan
中科院分区:
文献类型:
--
作者:
Ch.J. Sahle;C. Sternemann;H. Sternemann;J.S. Tse;R.A. Gordon;S. Desgreniers;S. Maekawa;S. Yamanaka;F. Lehmkühler;D.C.F. Wieland;K. Mende;S. Huotari;M. Tolan
The shape of the Ba 4d–4f giant dipole resonance is studied for Ba atoms embedded inside complex Si networks covering structures consisting of Si nanocages and nanotubes, ie the clathrate Ba 8 Si 46, the complex compound BaSi 6, and the semiconducting BaSi 2. Here, non-resonant x-ray Raman scattering is used to investigate confinement effects on the shape of the giant resonance in the vicinity of the Ba N IV, V-edge. The distinct momentum transfer dependence of the spectra is analyzed and discussed. The measurements are compared to calculations of the giant resonance within time-dependent local density approximation in the dipole limit. No modulation of the giant resonance's shape for Ba atoms confined in different local environments was observed, in contrast to the calculations. The absence of such shape modulation for complex Ba/Si compounds is discussed providing important implications for further studies of giant resonance phenomena utilizing both theory and experiment.
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影响因子:
2.9
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通讯作者:
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DOI:
--
发表时间:
2011
期刊:
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--
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2013
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期刊:
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T. Sagawa
DOI:
--
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1995
期刊:
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--
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J. Luberek;G. Wendin
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