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Finite‐Barrier Height Effect on the Magnetoabsorption of a Shallow Donor in a Quantum Well Wire
Author(s) -
Zorkani I.,
Mdaa A.,
Elkhenifer R.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199910)215:2<1005::aid-pssb1005>3.0.co;2-7
Subject(s) - shallow donor , condensed matter physics , magnetic field , quantum wire , wave function , absorption (acoustics) , impurity , quantum well , attenuation coefficient , physics , quantum , quantum mechanics , optics , laser
We report a calculation of the absorption coefficient of donor impurities located at the center of a quasi‐1D GaAs quantum well wire with finite confinement potential as a function of photon energies for different wire widths. The theory has been formulated by using suitable variational wave functions. In the presence of a uniform magnetic field applied along the axis of the wire, there is an enhancement in the absorption peak as the size of the wire is increased and a reduction of this peak as the magnetic field is increased. We see clearly that the effect of confinement is more important compared to the effect of the magnetic field. A comparison with the infinite barrier potential is also investigated.