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Forward Electron-Phonon Scattering in Normal and Superconducting States

O. V. Dolgov, O. V. Danylenko, M. L. Kulic, V. Oudovenko

cond-mat.supr-conarXiv:cond-mat/9804081

Abstract

The sharp forward electron-phonon (FEP) and impurity (FIS) scattering change the normal and superconducting properties significantly. The pseudo-gap like features are present in the density of states for ω<Ω, where Ω is the phonon frequency. The superconducting critical temperature Tc, due to the FEP pairing, is linear with respect to the electron-phonon coupling constant. The FIS impurities are pair weakening for s- and d-wave pairing.

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