Boundary effects on one-particle spectra of Luttinger liquids
arXiv:cond-mat/9903121 · doi:10.1103/PhysRevB.61.4393
Abstract
We calculate one-particle spectra for a variety of models of Luttinger liquids with open boundary conditions. For the repulsive Hubbard model the spectral weight close to the boundary is enhanced in a large energy range around the chemical potential. A power law suppression, previously predicted by bosonization, only occurs after a crossover at energies very close to the chemical potential. Our comparison with exact spectra shows that the effects of boundaries can partly be understood within the Hartree-Fock approximation.
4 pages including 4 figures, revised version, to be published in Phys. Rev. B, January 2000