Ground state phase diagram of the repulsive fermionic $t-t^{\prime }$ Hubbard model on the square lattice from weak-coupling

Fedor Simkovic, Xuan-Wen Liu, Youjin Deng +1

We obtain a complete and exact in the weak-coupling limit ($U\to 0$) ground state phase diagram of the repulsive fermionic Hubbard model on the square lattice for filling…