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

Eryin Lin ； Han-Qin Ding ； Jun Zhang

《Chinese Journal of Physics》 預刊文章 Pp. 73-83

https://doi.org/10.6122/CJP.20141014

並列摘要

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 at 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.