Strongly interacting two-dimensional Dirac fermions

L.K. Lim, A. Lazarides, Andreas Hemmerich, C. de Morais Smith

Research output: Contribution to journalArticleAcademicpeer-review

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 languageUndefined/Unknown
Pages (from-to)36001/1-36001/5
Number of pages5
JournalEurophysics Letters
Volume88
Issue number3
Publication statusPublished - 2009

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