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The binding energy and impurity polarizability of hydrogenic donors in a spherical quantum dot of Cd1−xinMnxinTe/Cd1−xoutMnxoutTe structure are presented assuming parabolic confinement. Within the effective mass approximation, the effects of electric field, as a function of dot size, are discussed on the results obtained using a variational method. The results show that the impurity binding energy...
The nonequilibrium Keldysh Green function technique is used to study the electronic transport property of a four-quantum-dot ring system in a four-terminal configuration. A general formula for the current under dc bias is obtained; the linear conductance characteristic is numerically studied.
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