Photoemission spectra in t-J ladders with two legs.

Photoemission spectra for the isotropic two-leg t-J ladder are calculated at various hole-doping levels using Exact Diagonalization techniques. Lowenergy sharp features caused by short-range antiferromagnetic correlations are observed at finite doping levels close to half-filling, above the naive Fermi momentum. These features should be observable in angle-resolved photoemission experiments. In addition, the formation of a d-wave pairing condensate as the ratio J/t is increased leads to dynamically generated spectral weight for momenta close to kF where the dx2−y2-order parameter is large. Typeset using REVTEX