Phases of Mott-Hubbard bilayers
| dc.creator | Han, Jung Hoon | |
| dc.creator | Jia, Chenglong | |
| dc.date | 2006-05-17 | |
| dc.date.accessioned | 2026-07-07T07:09:00Z | |
| dc.date.available | 2026-07-07T07:09:00Z | |
| dc.description | A phase diagram of two Mott-Hubbard planes interacting with a short-range Coulomb repulsion is presented. Considering the case of equal amount of doping by holes in one layer as electrons in the other, a holon-doublon inter-layer exciton formation is shown to be a natural consequence of Coulomb attraction. Quasiparticle spectrum is gapped and incoherent below a critical doping $δ_c$ due to the formation of excitons. A spin liquid insulator (SLI) phase is thus realized without the lattice frustration. The critical value $δ_{c}$ sensitively depends on the inter-layer interaction strength. In the $tJ$ model description of each layer with the d-wave pairing, $δ_{c}$ marks the crossover between SLI and d-wave superconductor. The SLI phase, despite being non-superconducting and charge-gapped, still shows electromagnetic response similar to that of a superfluid due to the exciton transport. Including antiferromagnetic order in the $tJ$ model introduces magnetically ordered phases at low doping and pushes the spin liquid phase to a larger inter-layer interaction strength and higher doping concentrations. | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0605426 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0605426 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/110910 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Phases of Mott-Hubbard bilayers | |
| dc.type | text |