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Chinese Physics, 2002, Vol. 11(8): 809-811    DOI: 10.1088/1009-1963/11/8/311
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

The soliton properties of dipole domains in superlattices

Zhang Qi-Yi (张启义), Tian Qiang (田强)
Department of Physics, Beijing Normal University, Beijing 100875, China
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.
Keywords:  superlattice      dipole domain      soliton      nonlinear Schr?dinger equation  
Received:  20 March 2002      Revised:  16 April 2002      Accepted manuscript online: 
PACS:  61.46.-w (Structure of nanoscale materials)  
  68.37.Vj (Field emission and field-ion microscopy)  
  81.40.Gh (Other heat and thermomechanical treatments)  
Fund: Project supported by the Foundation for University Key Teachers from Ministry of Education of China.

Cite this article: 

Zhang Qi-Yi (张启义), Tian Qiang (田强) The soliton properties of dipole domains in superlattices 2002 Chinese Physics 11 809

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