Ground State Phase Diagram of an Extended Hubbard Chain with Spin-Dependent Interaction
Er-Yin Lin, Hanqin Ding, Jun Zhang
A half-filled one-dimensional (1D) extended Hubbard model (U-V_⊥-V_∥) with on-site and nearest-neighbor spin-dependent interactions is studied analytically. The ground state phase diagram is obtained in the weak-coupling regime by performing the bosonization and renormalization group methods. The result shows that the nearest-neighbor spin-dependent attraction influences the low-energy physics of the 1D correlated electron system, and changes the topological structure of the ground state phase diagram of the U-V model.
Chinese Journal of Physics•Apr 1, 2015•0 citations