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Hydrostatic pressure, temperature and aluminum concentration effects on the ground state of coupled donors in a GaAs–Ga1−xAlxAs quantum well

The combined effects of hydrostatic pressure, temperature, and aluminum concentration on the binding and total energies of two coupled donors D2+ are analyzed using a variational procedure. The effects of changing the nucleus–nucleus relative positions and the quantum well size on the D2+ complex binding energy were also analyzed. The results show that an increase in the temperature yields a decrease of the D2+ binding energy while an increase in the aluminum concentration or hydrostatic pressure, enhance the D2+ binding energy favoring the stability of D2+ molecular complex under strong quantum confinement conditions.