中国物理B ›› 2002, Vol. 11 ›› Issue (8): 809-811.doi: 10.1088/1009-1963/11/8/311

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The soliton properties of dipole domains in superlattices

张启义, 田强   

  1. Department of Physics, Beijing Normal University, Beijing 100875, China
  • 收稿日期:2002-03-20 修回日期:2002-04-16 出版日期:2002-08-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the Foundation for University Key Teachers from Ministry of Education of China.

The soliton properties of dipole domains in superlattices

Zhang Qi-Yi (张启义), Tian Qiang (田强)   

  1. Department of Physics, Beijing Normal University, Beijing 100875, China
  • Received:2002-03-20 Revised:2002-04-16 Online:2002-08-12 Published:2005-06-12
  • Supported by:
    Project supported by the Foundation for University Key Teachers from Ministry of Education of China.

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摘要： The formation and propagation of dipole domains in superlattices are studied both by the modified discrete drift model and by the nonlinear Schr?dinger equation. The spatiotemporal distribution of the electric field and electron density are presented. The numerical results are compared with the soliton solutions of the nonlinear Schr?dinger equation and analysed. It is shown that the numerical solutions agree with the soliton solutions of the nonlinear Schr?dinger equation. The dipole electric-field domains in semiconductor superlattices have the properties of solitons.

Abstract: The formation and propagation of dipole domains in superlattices are studied both by the modified discrete drift model and by the nonlinear Schr?dinger equation. The spatiotemporal distribution of the electric field and electron density are presented. The numerical results are compared with the soliton solutions of the nonlinear Schr?dinger equation and analysed. It is shown that the numerical solutions agree with the soliton solutions of the nonlinear Schr?dinger equation. The dipole electric-field domains in semiconductor superlattices have the properties of solitons.

Key words: superlattice, dipole domain, soliton, nonlinear Schr?dinger equation

中图分类号:  (Structure of nanoscale materials)

  • 61.46.-w
68.37.Vj (Field emission and field-ion microscopy) 81.40.Gh (Other heat and thermomechanical treatments)