Pairing Symmetry in a Two-Orbital Exchange Coupling Model of Oxypnictides

Kangjun Seo, B. Andrei Bernevig, Jiangping Hu

We study the pairing symmetry of a two orbital $J_1-J_2$ model for FeAs layers in oxypnictides. We vary the doping and the value of $J_1$ and $J_2$ to compare all possible pairing…