Spin polarons in high Tc superconductors

Abstract

In a recent paper on spin polarons, the motion of a single hole in a two-dimensional Heisenberg antiferromagnet was analyzed based on the t-J model in the slave boson formulation. Holes were described as spinless bosons (holons) and spins were treated as normal fermions (spinons). Using the linear spin-wave theory, spin dynamics was discussed with the assumption of long-range antiferromagnetic order, thereby closely resembling the conventional polaron problem. Using finite-cluster geometries for the numerical solution, the holon Green's function was calculated self-consistently within the Born approximation. The result revealed that even in the strong-coupling regime, the formulation of the dynamics of a holon in the t-J model was quite valuable.