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Flux-density wave and superconducting instability of the staggered-flux phase

Ziqiang Wang, Gabriel Kotliar, and Xiao-Fang Wang
Phys. Rev. B 42, 8690(R) – Published 1 November 1990
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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 δc=a(J/t)2, is a flux-density-wave instability with an incommensurability wave number ∼δ3/4. The instability towards a modulated-flux state is due to low-lying phase fluctuations of the valence bonds. When the doping parameter exceeds δc, 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

Authors & Affiliations

Ziqiang Wang and Gabriel Kotliar

  • Department of Physics, Rutgers University, Piscataway, New Jersey 08854

Xiao-Fang Wang

  • Department of Physics, Columbia University, New York, New York 10027

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Vol. 42, Iss. 13 — 1 November 1990

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