t-J model for a bilayer: Coexisting superconductivity and planar-flux phases

Phys. Rev. B 71, 054508 – Published 15 February 2005
Hongbo Zhao and Jan R. Engelbrecht

Abstract

We study the bilayer generalization of the t-J model with both hopping and exchange coupling between the two layers. Within the enlarged mean-field parameter space, we find dimerized, s+id, flux ladder and planar flux phases. Of particular interest is the planar flux phase that persists farther away from half-filling, and coexists with, and even stabilizes, dx2y2-superconductivity. The orbital currents in the phase generate staggered moments that are rotated away from the c-axis.

DOI: http://dx.doi.org/10.1103/PhysRevB.71.054508

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  • Received 19 August 2004
  • Published 15 February 2005

© 2005 The American Physical Society

Authors & Affiliations

Hongbo Zhao* and Jan R. Engelbrecht

  • Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA

  • *Present address: Department of Physics, University of Arizona, 1118 E. 4th Street, P.O. Box 210081 Tucson, AZ 85721, USA.

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