Surface metal-insulator transition in the Hubbard model
arXiv:cond-mat/9811135 · doi:10.1103/PhysRevB.59.2549
Abstract
The correlation-driven metal-insulator (Mott) transition at a solid surface is studied within the Hubbard model for a semi-infinite lattice by means of the dynamical mean-field theory. The transition takes place at a unique critical strength of the interaction. Depending on the surface geometry, the interaction strength and the wave vector, we find one-electron excitations in the coherent part of the surface-projected metallic spectrum which are confined to two dimensions.
LaTeX, 9 pages, 5 eps figures included, Phys. Rev. B (in press)