Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2010, Vol. 33 ›› Issue (3): 84-87.doi: 10.13190/jbupt.201003.84.033

• Papers • Previous Articles     Next Articles

The Influence of Magnetic Field on the Electron Ground State 

Energy of Two-Dimensional Quantum Ring

JIA Bo-yong, LIU Yu-min, ZHAO Wei, YU Zhong-yuan, HAN Li-hong   

  1. (Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), 

    Ministry of Education, Beijing 100876, China)

  • Received:2009-06-18 Revised:2010-03-11 Online:2010-06-28 Published:2010-05-14

Abstract:

In the framework of effective mass envelope function, by solving the single-band Schrdinger 

equation, the ground state energy level of two-dimensional InAs/GaAs quantum ring is 

calculated both in the absence and the presence of the magnetic field to analyze the electronic 

structure of quantum ring nanomaterials. The relationships between the energy level 

and the inner radius, outer radius, average radius and width of the ring are analyzed. It is indicated 

that the magnetic field perpendicular to the plane of the quantum ring will evidently increase the 

ground state energy. Moreover, the magnetic field makes the dependence of the energy level on 

outer radius of the ring weaker, i.e. the level will keep in changeless if the outer radius exceeds a

 critical value.

Key words: twodimensional quantum ring, electron, ground state energy level, magnetic field

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