title: Topological phase transition in quasi-one dimensional organic conductors.
abstract: We explore topological phase transition, which involves the energy spectra of field-induced spin-density-wave (FISDW) states in quasi-one dimensional (Q1D) organic conductors, using an extended Su-Schrieffer-Heeger (SSH) model. We show that, in presence of half magnetic-flux FISDW state, the system exhibits topologically nontrivial phases, which can be characterized by a nonzero Chern number. The nontrivial evolution of the bulk bands with chemical potential in a topological phase transition is discussed. We show that the system can have a similar phase diagram which is discussed in the Haldane's model. We suggest that the topological feature should be tested experimentally in this organic system. These studies enrich the theoretical research on topologically nontrivial phases in the Q1D lattice system as compared to the Haldane topological phase appearing in the two-dimensional lattices.
authors.affiliation: College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China.
authors.forename: Xiao-Shan
authors.initials: XS
authors.lastname: Ye
authors.affiliation: College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China.
authors.forename: Yong-Jun
authors.initials: YJ
authors.lastname: Liu
authors.affiliation: College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China.
authors.forename: Xiang-Hua
authors.initials: XH
authors.lastname: Zeng
authors.affiliation: College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China.|Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
authors.forename: Guoqing
authors.initials: G
authors.lastname: Wu