L.-K. Lim et al 2009 EPL 88 36001 doi:10.1209/0295-5075/88/36001
L.-K. Lim1, A. Lazarides1, A. Hemmerich2 and C. Morais Smith1
Show affiliationsWe 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.
71.10.Fd Lattice fermion models (Hubbard model, etc.)
Issue 3 (November 2009)
Received 23 September 2009, accepted for publication 14 October 2009
Published 2 November 2009
L.-K. Lim et al 2009 EPL 88 36001
Mikhail N. Smolyakov JHEP11(2009)077
R H M Smit et al 2009 New J. Phys. 11 073043
S K Dutta and G Raithel 2000 J. Opt. B: Quantum Semiclass. Opt. 2 651
S Mukhopadhyay et al 2009 JINST 4 P11004
A Jezierski 1990 J. Phys.: Condens. Matter 2 493
C Van den Broeck et al 2005 New J. Phys. 7 10
K Weyand et al 2001 Metrologia 38 187
M J T Milton and R I Wielgosz 2000 Metrologia 37 199
P Moser and R Pichon 1973 J. Phys. F: Met. Phys. 3 363