The t-J model on a semi-infinite lattice

J Phys Condens Matter. 2010 Sep 22;22(37):375603. doi: 10.1088/0953-8984/22/37/375603. Epub 2010 Aug 31.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Computer Simulation*
  • Crystallization*
  • Crystallography
  • Models, Chemical*
  • Spectrum Analysis / instrumentation*