Abstract
We study the stability of the staggered-flux phase in the t-J model away from half-filling using a systematic large-N slave-boson approach. Found below a critical doping concentration =a(J/t, is a flux-density-wave instability with an incommensurability wave number ∼. The instability towards a modulated-flux state is due to low-lying phase fluctuations of the valence bonds. When the doping parameter exceeds , we find a fully gapped d-wave superconducting state due to residual quasiparticle interactions.
- Received 22 May 1990
DOI:https://doi.org/10.1103/PhysRevB.42.8690
©1990 American Physical Society