中国物理B ›› 2005, Vol. 14 ›› Issue (1): 201-207.doi: 10.1088/1009-1963/14/1/037

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Resonant tunnelling in parabolic quantum well structures under a uniform transverse magnetic field

宫箭1, 梁希侠2, 班士良2   

  1. (1)Department of Physics, College of Sciences and Technology, Inner Mongolia University, Hohhot,010021, China; (2)Department of Physics, College of Sciences and Technology, Inner Mongolia University, Hohhot,010021, China;CCAST (Word Laboratory), Beijing,100080, China
  • 收稿日期:2004-05-28 修回日期:2004-09-16 出版日期:2005-01-20 发布日期:2005-01-20
  • 基金资助:
    Project supported partly by the National Natural Science Foundation of China (Grant No 10164003) and the Foundation for University Key Teachers by the Ministry of Education (Grant No GG-140-10126-1005)

Resonant tunnelling in parabolic quantum well structures under a uniform transverse magnetic field

Gong Jian (宫箭)a, Liang Xi-Xia (梁希侠)ab, Ban Shi-Liang (班士良)ab   

  1. a Department of Physics, College of Sciences and Technology, Inner Mongolia University, Hohhot 010021, China; bCCAST (Word Laboratory), Beijing 100080, China
  • Received:2004-05-28 Revised:2004-09-16 Online:2005-01-20 Published:2005-01-20
  • Supported by:
    Project supported partly by the National Natural Science Foundation of China (Grant No 10164003) and the Foundation for University Key Teachers by the Ministry of Education (Grant No GG-140-10126-1005)

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摘要： The resonant tunnelling through parabolic quantum well structures under a uniform transverse magnetic field is investigated by a simple numerical method. Numerical results of the transmission coefficient are obtained for several GaAs--AlxGa1-xAs parabolic well structures. It is found that the resonant peaks shift towards the higher energy region as the magnetic field increases, and some new resonant peaks emerge when the magnetic field becomes stronger. The J-V characteristics of a parabolic quantum well are discussed for the cyclotron centre located at different positions. It is also found that the cyclotron centre located at the parabolic well centre is helpful to explain the experiment, and the peak current densities decrease and shift to higher bias with the increase of magnetic field. The influence of mixed crystal effect on the J-V characteristic under a uniform transverse magnetic field is also investigated.

关键词: resonant tunnelling, parabolic quantum well, transverse magnetic field

Abstract: The resonant tunnelling through parabolic quantum well structures under a uniform transverse magnetic field is investigated by a simple numerical method. Numerical results of the transmission coefficient are obtained for several GaAs--AlxGa1-xAs parabolic well structures. It is found that the resonant peaks shift towards the higher energy region as the magnetic field increases, and some new resonant peaks emerge when the magnetic field becomes stronger. The J-V characteristics of a parabolic quantum well are discussed for the cyclotron centre located at different positions. It is also found that the cyclotron centre located at the parabolic well centre is helpful to explain the experiment, and the peak current densities decrease and shift to higher bias with the increase of magnetic field. The influence of mixed crystal effect on the J-V characteristic under a uniform transverse magnetic field is also investigated.

Key words: resonant tunnelling, parabolic quantum well, transverse magnetic field

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  • 7320D