The binding energy of a hydrogenic impurity in self-assembled double quantum dots |
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| Authors: | Zhang Hong Wang Xue Zhao Jian-Feng Liu Jian-Jun |
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| Affiliation: | College of Science, Hebei University of Engineering, Handan 056038, China; College of Physical Science and Information Engineering, Hebei Normal University, Shijiazhuang 050016, China |
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| Abstract: | The binding energy of a hydrogenic impurity in self-assembled double quantum dots is calculated via the finite-difference method. The variation in binding energy with donor position, structure parameters and external magnetic field is studied in detail. The results found are: (i) the binding energy has a complex behaviour due to coupling between the two dots; (ii) the binding energy is much larger when the donor is placed in the centre of one dot than in other positions; and (iii) the external magnetic field has different effects on the binding energy for different quantum-dot sizes or lateral confinements. |
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| Keywords: | hydrogenic impurity double quantum dots binding energy magnetic field |
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