Velocity renormalization in a quasi–two-dimensional electron gas

M. Weger, L. Burlachkov, M. Kaveh

Research output: Contribution to journalLetterpeer-review

8 Scopus citations


It is shown that for a quasi–two-dimensional electron gas embedded in a material with a large dielectric constant ε, the plasma frequency ωp(q) for small momenta q may be less than the quasi-particle excitation energy υ(kF) ∙ q. Under this condition, the screening of the Coulomb interaction is determined by the single-particle density of states. This gives rise to a significant increase of the velocity υ near the Fermi surface and, in turn, to an anomalous renormalization of the transport properties. The results are applied to explain the normal properties of the high-Tcsuperconductors.

Original languageEnglish
Pages (from-to)505-511
Number of pages7
Issue number6
StatePublished - 15 Jul 1992


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