Abstract
We present a slave-particle mean-field study of the mixed boson+fermion quantum dimer model introduced by Punk et al. [Proc. Natl. Acad. Sci. USA 112, 9552 (2015)] to describe the physics of the pseudogap phase in cuprate superconductors. Our analysis naturally leads to four charge fermion pockets whose total area is equal to the hole doping for a range of parameters consistent with the model for high-temperature superconductivity. Here we find that the dimers are unstable to -wave superconductivity at low temperatures. The region of the phase diagram with -wave rather than -wave superconductivity matches well with the appearance of the four fermion pockets. In the superconducting regime, the dispersion contains eight Dirac cones along the diagonals of the Brillouin zone.
- Received 30 June 2016
DOI:https://doi.org/10.1103/PhysRevB.95.174511
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