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It is shown that if one takes into account the effective mass of the electron, which in real structures is actually different than the free electron mass, the electron and positron self-energy effects may result in flatter and smaller enhancement of the electron-positron momentum distribution. Thus, the many-body effects mentioned above, among other reasons like e.g. influence of lattice potential...
A numerical procedure based on the time-dependent Kohn-Sham equation with an improved boundary condition for the modeling double barrier resonant tunneling diode is presented. The dependence of current components on well widths in AlGaAs/GaAs/AlGaAs structure is studied. An oscillatory behavior was observed as the width of the well is changed. Our evaluation shows that this oscillation cannot attribute...
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