中国物理B ›› 1995, Vol. 4 ›› Issue (12): 917-922.doi: 10.1088/1004-423X/4/12/006

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STUDIES ON THE NEXT-NEAREST NEIGHBOR HOPPING INTERACTIONS OF π-ELECTRONS IN QUASI-ONE-DIMENSIONAL ORGANIC FERROMAGNETIC MODEL

姚凯伦1, 方忠2, 刘祖黎2, 李再光3   

  1. (1)International Center of Material Physics, Academy Sinica, Shenyang 110015; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; (2); (3)State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:1994-12-14 出版日期:1995-12-20 发布日期:1995-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China.

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   

  1. 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
  • Received:1994-12-14 Online:1995-12-20 Published:1995-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China.

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摘要： Based on a theoretical model proposed for quasi-one-dimensional organic polymer fer-romagnets, the next-nearest neighbor hopping interactions of sr-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.

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.

中图分类号:  (Spin-density waves)

  • 75.30.Fv
75.50.Dd (Nonmetallic ferromagnetic materials) 75.10.-b (General theory and models of magnetic ordering)