Magneto-optics of multi-well quantum structures with D2- centres

TL;DR

This study investigates how a magnetic field influences electron binding states and magneto-optical absorption spectra of D2- centers in semiconductor quantum wells, revealing significant shifts and stabilization effects.

Contribution

It introduces a zero-range potential model to analyze the magnetic field effects on D2- centers in quantum wells, highlighting the dependence on light polarization and impurity configuration.

Findings

Magnetic field causes significant shifts in g- and u-term positions.

Magneto-optical absorption spectrum depends on light polarization.

D2- states are stabilized in the quantum well environment.

Abstract

The problem of electron binding states in field of two D0 centres in semiconductive quantum well (QW) in the presence of an external longitudinal magnetic field (along the QW growth axis) is studied within the framework of zero-range potential model. It is found that the magnetic field leads to a considerable change in positions of g- and u-terms, and to a stabilization of the D2- states in QW. It is shown that a form of impurity magneto-optical absorption spectrum essentially depends on the light polarization direction and on the spatial configuration of the D2- molecular ion in QW.