Abstract
Using a proposed numerical technique for calculating anomalous Green’s functions characteristic of superconductivity, we show that the low-lying excitations in a wide parameter and doping region of the two-dimensional t-J model are well described by the picture of dressed Bogoliubov quasiparticles in the BCS pairing theory. The pairing occurs predominantly in the --wave channel and the energy gap has a size ≃0.15J–0.27J between quarter and half fillings. Opening of the superconducting gap in the photoemission and inverse-photoemission spectra is demonstrated.
- Received 10 March 1994
DOI:https://doi.org/10.1103/PhysRevLett.73.324
©1994 American Physical Society