Magnetic Field Effect on the Binding Energy of a Hydrogenic Donor Impurity in Cylindrical Quantum Ring

Abstract:

The binding energy of a hydrogenic donor impurity in cylindrical GaAs quantum ring (QR) subjected to an external magnetic field is calculated within the effect mass approximation using variational method. The binding energy as a function of the QR size (the inner radius, the outer radius), the impurity position and the applied magnetic field is investigated. The results demonstrate that the ground state binding energy behaves as an decreasing function of the outer radius, and the magnetic field. Likewise, the binding energy is an increasing function of the inner radius. The binding energy firstly increases and then decreases with shifting the impurity ion from the internal surface of the QR to the external surface, indicating that there is a maximum.

• Periodical: Applied Mechanics and Materials (Volumes 380-384)
• Pages: 4841-4844
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.380-384.4841
• Online since: August 2013
• Authors: Guang Xin Wang, Xiu Zhi Duan
• Keywords: Binding Energy, Hydrogenic Impurity, Magnetic Field, Quantum Ring

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