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Resonance in One--Dimensional Fermi--Edge Singularity | | Yuval Oreg
; Alexander M. Finkel’stein
; | | Date: |
7 Dec 1995 | | Journal: | Phys. Rev. B 53, 10928 (1996) | | Subject: | cond-mat | | Abstract: | The problem of the Fermi--edge singularity in a one--dimensional Tomonaga--Luttinger liquid is reconsidered. The backward scattering of the conduction band electrons on the impurity--like hole in the valence band is analyzed by mapping the problem onto a Coulomb gas theory. For the case when the electron--electron interaction is repulsive the obtained exponent of the one--dimensional Fermi--edge singularity appears to be different from the exponent found in the previous studies. It is shown that the infrared physics of the Fermi--edge singularity in the presence of backward scattering and electron--electron repulsion resembles the physics of the Kondo problem. | | Source: | arXiv, cond-mat/9601021 | | Services: | Forum | Review | PDF | Favorites | |
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