A Negative Donor Center Trapped by a Spherical Quantum Dot |
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Authors: | XIE Wen-Fang |
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Institution: | Department of Physics, Guangzhou University, Guangzhou 510006, China |
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Abstract: | The properties of the low-lying states of a negative donor center trapped by
a spherical quantum dot, which is subjected to a parabolic potential
confinement, are investigated in the absence of magnetic field. The
calculations have been performed by means of the exact diagonalization of
the Hamiltonian matrix within the effective-mass approximation. We find that there is only one bound state the D- center in a spherical parabolic quantum dot in the absence of magnetic field. The binding energy of the ground state is obtained as a function of the dot size. Moreover, the critical confined potential radius value at which the negative donor center changes from unbound to bound is obtained. |
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Keywords: | quantum dots donor |
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