info:eu-repo/semantics/article
Infinite Potential Barrier and Hydrostatic Pressure Effects on Impurity-Related Optical Absorption Spectra in GaAs Double Quantum Wells
Registro en:
1039733
10.1590/S0103-97332006000300031
1678-4448
Autor
Raigoza Bohorquez, Nicolás
Morales Aramburo, Álvaro Luis
Duque Echeverri, Carlos Alberto
Institución
Resumen
ABSTRACT: Using the effective-mass approximation and the variational method, we have calculated the effects of hydrostatic pressure on the donor- and acceptor-related optical absorption spectra in symmetrical GaAs double
quantum well structures. A central finite potential barrier and two infinite external barriers constitute the profile
of the potential barrier considered for the wells. Our results are presented as a function of the well and barrier
widths and hydrostatic pressure. For the pressure dependence we consider the Γ−X mixing in the central barrier
layer. For symmetrical and infinite-external-barrier quantum wells, and depending on the sizes of the structure
and the hydrostatic pressure, the donor-related spectra show three special structures, whereas for the acceptor
one only two structures appear. COL0008138