Ground state pairing correlation competes in the doped triangular lattice Hubbard model Shuai Cheng, Xin Wang, Suhang Liu and Tianxing Ma Eur. Phys. J. B, 87 11 (2014) 270 Published online: 17 November 2014 DOI: 10.1140/epjb/e2014-50585-2