Publication Details:
Journal or Publication Title:
Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես
Date of publication:
Volume:
Number:
ISSN:
Official URL:
Title:
ELECTROABSORPTION IN A NARROW GAP InSb QUANTUM RING: ROTATOR MODEL
Creator:
Subject:
Physics ; Electronic structure and electrical properties of surfaces
Coverage:
Abstract:
For the case of the two-dimensional rotator model a theoretical investigation of electronic states and interband dipole transitions in narrow gap InSb cylindrical layer quantum dot under the influence of both magnetic and electric fields has been done. The dispersion law for light hole and conduction electron is considered within the framework of two-band Kane model while for the heavy hole the parabolic dispersion law is used. An expression for the energy spectrum of cylindrical quantum rings is found. It is shown that in the case of non-parabolic dispersion law the energy spectrum is proportional to and under square root unlike to the case of parabolic dispersion law where the energy has the same dependence but without root ( is the magnetic flux and is the quantum of magnetic flux).The threshold frequencies were calculated and the selection rules are found. The influences of external homogeneous electric field on the system are considered within the framework of perturbation theory for two different orientations. Direct calculation showed that the Stark shift in both cases seems to be quadratic. The effect of existence of the electric field on the interband dipole transition produces a new quantum number selection rules.