Topological phase separation in 2D quantum lattice Bose-Hubbard system away from half-filling

Details Topological phase separation in 2D quantum lattice Bose-Hubbard system away from half-filling Topological phase separation in 2D quantum lattice Bose-Hubbard system away from half-filling

2004-04-23

arxiv.org/abs/cond-mat/0404562v1

PRB, 2004

Physics

Condensed Matter

Superconductivity

12 pages, 6 figures

Scientific paper

10.1103/PhysRevB.69.214505

We suppose that the doping of the 2D hard-core boson system away from half-filling may result in the formation of multi-center topological inhomogeneity (defect) such as charge order (CO) bubble domain(s) with Bose superfluid (BS) and extra bosons both localized in domain wall(s), or a {\it topological} CO+BS {\it phase separation}, rather than an uniform mixed CO+BS supersolid phase. Starting from the classical model we predict the properties of the respective quantum system. The long-wavelength behavior of the system is believed to remind that of granular superconductors, CDW materials, Wigner crystals, and multi-skyrmion system akin in a quantum Hall ferromagnetic state of a 2D electron gas. To elucidate the role played by quantum effects and that of the lattice discreteness we have addressed the simplest nanoscopic counterpart of the bubble domain in a checkerboard CO phase of 2D hc-BH square lattice. It is shown that the relative magnitude and symmetry of multi-component order parameter are mainly determined by the sign of the $nn$ and $nnn$ transfer integrals. In general, the topologically inhomogeneous phase of the hc-BH system away from the half-filling can exhibit the signatures both of $s,d$, and $p$ symmetry of the off-diagonal order.

Affiliated with

Also associated with

No associations

Rating

Topological phase separation in 2D quantum lattice Bose-Hubbard system away from half-filling does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Topological phase separation in 2D quantum lattice Bose-Hubbard system away from half-filling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Topological phase separation in 2D quantum lattice Bose-Hubbard system away from half-filling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1435