Scattering Theory for the Metamorphism of Van Hove Singularities in the Optical Spectra of Solids

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概要

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• The metamorphism of Van Hove singularities in the optical absorption spectra of solids is described in terms of the scattering theory. The infrared absorption of phonons induced by an impurity ion in a nonpolar crystal and the interband absorption of electrons in a semiconductor are discussed in detail, in which scattering of phonons by an impurity ion and that of the relative motion of an electron-hole pair by the electron-hole interaction are taken into account. The metamorphism of Van Hove singularities occurs in the optical spectra due to the interference between incoming and scattered waves, and is described by two phases η_1 and η_2. η_1 is the phase shift of scattering, and η_2 is the optical structure factor of the scattering potential. phonon sidebands of localized electron or phonon absorption, with the metamorphism of their Van Hove singularities, can be treated in the same form.

• 社団法人日本物理学会の論文
• 1970-11-05

著者

• Sumi Hitoshi

  The Institute For Solid State Physics University Of Tokyo:(present Address)electrotechnical Laborato

• Sumi Hitoshi

  The Institute For Solid State Physics The University Of Tokyo

関連論文

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