中国物理B ›› 1994, Vol. 3 ›› Issue (11): 836-842.doi: 10.1088/1004-423X/3/11/006

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

THE 2D LOCALIZED MODES OF BIPOLARON IN cis-POLYACETYLENE

李占杰1, 安忠1, 姚凯伦2   

  1. (1)Department of Physics, State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China; (2)Department of Physics,Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:1994-01-25 出版日期:1994-11-20 发布日期:1994-11-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China.

THE 2D LOCALIZED MODES OF BIPOLARON IN cis-POLYACETYLENE

LI ZHAN-JIE (李占杰)a, AN ZHONG (安忠)a, YAO KAI-LUN (姚凯伦)b   

  1. a Department of Physics, State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China; b Department of Physics,Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:1994-01-25 Online:1994-11-20 Published:1994-11-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China.

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摘要： The localized vibrational modes around a bipolaron in cis-(CH)x are studied by using a two-dimensional extension of the SSH model that includes the bond-bending term. A number of additional modes have been found, compared with the results based on the standard SSH model The amplitudes of the two directions (x and y direction) are comparable for most of the modes as in the trans-(CH)x case. The number of localized modes and their frequencies depend not only on the coupling constant, but also on the bond-bending term and the parameter t1 in removing the degeneracy of the ground state.

Abstract: The localized vibrational modes around a bipolaron in cis-(CH)x are studied by using a two-dimensional extension of the SSH model that includes the bond-bending term. A number of additional modes have been found, compared with the results based on the standard SSH model The amplitudes of the two directions (x and y direction) are comparable for most of the modes as in the trans-(CH)x case. The number of localized modes and their frequencies depend not only on the coupling constant, but also on the bond-bending term and the parameter t1 in removing the degeneracy of the ground state.

中图分类号:  (Bipolarons)

  • 71.38.Mx
63.20.Pw (Localized modes)