Abstract
We show how strongly interacting two-dimensional Dirac fermions can be realized with ultracold atoms in a two-dimensional optical square lattice with an experimentally realistic, inherent gauge field, which breaks time reversal and inversion symmetries. We find remarkable phenomena in a temperature range around a tenth of the Fermi temperature, accessible with present experimental techniques: at zero chemical potential, besides a conventional s-wave superconducting phase, unconventional superconductivity with non-local bond pairing arises. In a temperature vs. doping phase diagram, the unconventional superconducting phase exhibits a dome structure, reminiscent of the phase diagram for high-temperature superconductors and heavy fermions.
| Original language | Undefined/Unknown |
|---|---|
| Pages (from-to) | 36001/1-36001/5 |
| Number of pages | 5 |
| Journal | Europhysics Letters |
| Volume | 88 |
| Issue number | 3 |
| Publication status | Published - 2009 |