Effective Spin Couplings in the Mott Insulator of the Honeycomb Lattice Hubbard Model

H-Y. Yang, A. F. Albuquerque, S. Capponi +2

Motivated by the recent discovery of a spin liquid phase for the Hubbard model on the honeycomb lattice at half-filling, we apply both perturbative and non-perturbative techniques…