Higher-Order Asymptotic Expansion for the Edge Singularities in Metals
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概要
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Higher-order coefficients of the asymptotic expansion (t= cO) for the soft-X-ray-ab-sorption response function I(t) are treated analytically. Based on the model byMahan and Nozi<Bres and de Dominicis, formulation is performed for the coefficientof any order and exact expressions are given for the leading three terms of the series.When transformed into the frequency space, the series of the expansion are expressedin a form with a frequency dependent exponent, which suggests strongly the validityof the generalized power-law formula proposed to surpass the one by Nozieres and deDominicis. For a model conduction band, some numerical examples are presented toshow wide applicability of the obtained formula.
- 社団法人日本物理学会の論文
- 1987-12-15
著者
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KITA Takafumi
Department of Physics, Hokkaido University
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Kita Takafumi
Department Of Applied Physics Faculty Of Engineering The University Of Tokyo
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