摘要
Two kinds of alignment of two neighboring organic ferromagnetic chains are studied with Su-Schrieffer-Heeger Hamiltonian added by Hubbard repulsion and antiferromagnetic correlation between side radicals and main chain.The results show that interchain coupling makes the energy gap decreasing.The out-of^phase alignment of two chains is energetically preferred to the in-phase alignment and it is a more possible ferromagnetic structure if the oscillatory part of interchain coupling of the in-phase is small.The spin density and dimerization along the main chain are also discussed.
作者
王为忠
姚凯伦
林海青
李洪涛
WANG Wei-zhong;YAO Kai-lun;LIN Hai-qing;LI Hong-tao(Department of Physics,Huazhong University of Science and Technology,Wuhan 430074;Department of Physics&Research Center of Materials Science and Technology,Chinese University of Hong Kong,Hong Kong;Department of Electronic Engineering,Dongguan Institute of Technology,Dongguan,Guangdong 511700)
基金
Supported by the National Natural Science Foundation of China under Grant No.19775016
the Direct Grant for Research from the Research Grants Council of the Hong Kong Goverment.