title: Spin polarization of excitons in organic multiferroic composites.
abstract: Recently, the discovery of room temperature magnetoelectricity in organic charge transfer complexes has reignited interest in the multiferroic field. The solution processed, large-area and low cost organic semiconductor materials offer new possibilities for the functional all organic multiferroic devices. Here we report the spin polarization of excitons and charge transfer states in organic charge transfer composites by using extended Su-Schrieffer-Heeger model including Coulomb interaction and spin-flip effect. With the consideration of spin polarization, we suggest a possible mechanism for the origin of excited ferromagnetism.
authors.affiliation: School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Ji Nan, 250100, China.
authors.forename: Shixuan
authors.initials: S
authors.lastname: Han
authors.affiliation: School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Ji Nan, 250100, China.
authors.forename: Liu
authors.initials: L
authors.lastname: Yang
authors.affiliation: School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Ji Nan, 250100, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Gao
authors.affiliation: School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Ji Nan, 250100, China.
authors.forename: Shijie
authors.initials: S
authors.lastname: Xie
authors.affiliation: Department of Mechanical Engineering and Temple Materials Institute, Temple University, Philadelphia, PA 19122, USA.|College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, 030024, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Qin
authors.affiliation: Department of Mechanical Engineering and Temple Materials Institute, Temple University, Philadelphia, PA 19122, USA.
authors.forename: Shenqiang
authors.initials: S
authors.lastname: Ren