Ground State Phase Diagram of an Extended Hubbard Chain with Spin-Dependent Interaction

10.6122/CJP.20141014

Er-Yin Lin；Han-Qin Ding；Jun Zhang

Chinese Journal of Physics

53卷2期（2015 / 04 / 01）

57 - 67

英文

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.