Abstract
The Fermi-edge singularity (FES) in optical spectra is studied theoretically for one-dimensional (1D) conductors. In calculation of the FES critical exponent, the electronic correlation and the charge- and spin-density fluctuations of the 1D degenerate electrons are taken into account by the Tomonaga-Luttinger bosonization technique. Spin dependence of the electron-electron and electron-hole pair scatterings is incorporated in the theory. The FES for the 1D systems with spin-split bands is also discussed in terms of the response to a circularly polarized light.
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