title: The t-J model on a semi-infinite lattice.
abstract: The hole spectral function of the t-J model on a two-dimensional semi-infinite lattice is calculated using the spin-wave and non-crossing approximations. In the case of small hole concentrations and strong correlations, t >> J, several near-boundary site rows appear to be depleted of holes. The reason is a deformation of the magnon cloud, which surrounds the hole, near the boundary. The hole depletion leads to a more complicated spectral function in the boundary row in comparison with its bulk shape. This is connected with a maximum related to the underlying row, which reveals itself in the boundary spectrum.
authors.affiliation: Institute of Physics, University of Tartu, Tartu, Estonia. alexei@fi.tartu.ee
authors.forename: A
authors.initials: A
authors.lastname: Sherman
authors.forename: N
authors.initials: N
authors.lastname: Voropajeva
mesh_terms: D003198:Computer Simulation; D003460:Crystallization; D003461:Crystallography; D008956:Models, Chemical; D013057:Spectrum Analysis / Q000295:instrumentation*