info:eu-repo/semantics/article
Hydrostatic pressure, impurity position and electric and magnetic field effects on the binding energy and photo-ionization cross section of a hydrogenic donor impurity in an InAs P¨oschl-Teller quantum ring
Registro en:
Barseghyan, M. & Mora-Ramos, M. & Duque, C.. (2011). Hydrostatic pressure, impurity position and electric and magnetic field effects on the binding energy and photo-ionization cross section of a hydrogenic donor impurity in an InAs P??schl-Teller quantum ring. The European Physical Journal B - Condensed Matter and Complex Systems. 84. 265-271. 10.1140/epjb/e2011-20650-7.
1434-6028
10.1140/epjb/e2011-20650-7
1434-6036
Autor
Duque Echeverri, Carlos Alberto
Mora Ramos, Miguel Eduardo
Barseghian, M. G.
Institución
Resumen
ABSTRACT: Using the variational method and the effective mass and parabolic band approximations, the
behaviour of the binding energy and photo-ionization cross section of a hydrogenic-like donor impurity in
an InAs quantum ring, with P¨oschl-Teller confinement potential along the axial direction, has been studied.
In the investigation, the combined effects of hydrostatic pressure and electric and magnetic fields applied
in the direction of growth have been taken into account. Parallel polarization of the incident radiation
and several values of the applied electric and magnetic fields, hydrostatic pressure, and parameters of the
P¨oschl-Teller confinement potential were considered. The results obtained can be summarised as follows:
(1) the influence of the applied electric and magnetic fields and the asymmetry degree of the P¨oschl-Teller
confinement potential on the donor binding energy is strongly dependent on the impurity position along
the growth and radial directions of the quantum ring, (2) the binding energy is an increasing function of
hydrostatic pressure and (3) the decrease (increase) in the binding energy with the electric and magnetic
fields and parameters of the confinement potential (hydrostatic pressure) leads to a red shift (blue shift)
of the maximum of the photo-ionization cross section spectrum of the on-centre impurity. COL0033319