Abstract
We study the many-body exchange-correlation properties of electrons confined to the lowest subband of a quantum wire, including effects of impurity scattering. Without impurity scattering, virtual excitations of arbitrarily low-energy plasmons destroy the Fermi surface of the electrons, whereas the presence of impurity scattering damps out these plasmons and restores he Fermi surface. The electron inelastic scattering rate Γ in the absence of scattering is zero below corresponding to the plasmon emission threshold, above which Γ diverges as (k- as k→. For typical wire widths and electron densities currently available, the band-gap renormalization is found to be 10–20 meV.
- Received 3 December 1991
DOI:https://doi.org/10.1103/PhysRevLett.68.1750
©1992 American Physical Society