STUDIES ON THE NEXT-NEAREST NEIGHBOR HOPPING INTERACTIONS OF $\pi$-ELECTRONS IN QUASI-ONE-DIMENSIONAL ORGANIC FERROMAGNETIC MODEL
FANG ZHONG (方忠)a, Liu Zu-li (刘祖黎)a, YAO KAI-LUN (姚凯伦)b, LI ZAI-GUANG (李再光)c
a State Key Laboratory of Laser Technology and Department of Physics, Huazhong University of science and Technology, Wuhan 430074, China; b International Center of Material Physics, Academy Sinica, Shenyang 110015; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; c State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract Based on a theoretical model proposed for quasi-one-dimensional organic polymer fer-romagnets, the next-nearest neighbor hopping interactions of $\pi$-electrons are considered. Allowing for full lattice relaxation, a set of self-consistent equations is established to study the system. The spin-density-wave (SDW) and the possible ferromagnetic ground state of the system are investigated in detail. It is found that the next-nearest neighbor hopping in-teractions will make the SDW stronger and consequently make the ferromagnetic state more stable as compared with the nonmagnetic reference state.
Received: 14 December 1994
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China.
Cite this article:
FANG ZHONG (方忠), Liu Zu-li (刘祖黎), YAO KAI-LUN (姚凯伦), LI ZAI-GUANG (李再光) STUDIES ON THE NEXT-NEAREST NEIGHBOR HOPPING INTERACTIONS OF $\pi$-ELECTRONS IN QUASI-ONE-DIMENSIONAL ORGANIC FERROMAGNETIC MODEL 1995 Acta Physica Sinica (Overseas Edition) 4 917
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