Weak-coupling Ground State Phase Diagram of the One-dimensional Extended Hubbard Model
Haiming Duan
By using the bosonization approach and renormalization group analysis,we study the ground state phase diagram of one-dimensional extended Hubbard model at half-filling in the regime where U and V are both positive but less than t, finding that the system shows three distinct ground states characterized by the spin-density-wave,the charge-density-wave and the bond-charge-density-wave,respectively.These results demonstrate that the ground state phases of the extended Hubbard model are not identical with those of the conventional Hubbard model.
Shinjang dashösi ilmiy jurnili•Jan 1, 2007•0 citations