Electron fractionalization and statistics of holons in doped quantum dimer models

I introduce a doped two-dimensional quantum dimer model describing a doped Mott insulator and retaining the original Fermi statistics [1]. This model shows a rich phase diagram including a d-wave hole-pair superconductor breaking translation symmetry (supersolid) at small doping, a bosonic superfluid at large doping and an exotic intermediate phase in-between. The hole kinetic energy is shown to favor binding of topological defects to the fermionic holons turning them into bosons, in agreement with arguments based on RVB wave-functions. Results are discussed in the context of cuprates superconductors and compared with those of a related bosonic doped quantum dimer model [2]. [1] D. Poilblanc, arXiv:0711.2229. [2] A. Ralko, F. Mila, and D. Poilblanc, Phys. Rev. Lett. 99, 127202 (2007).