Polarizabilities of Shallow Donors in Quantum Well Wires

Magnetic field and finite barrier-height effects on the polarizability of a shallow donor in a GaAs quantum wire

“…The single parameter trial wavefunction used in Ref. [6] is certainly not adequate since it preserves the spherical symmetry of the hydrogen-like wavefunction. It does not take into account the anisotropy effects introduced by the external magnetic field, i.e.…”

“…For the realistic case of a finite height confining potential Bryant [4] and Osoriõ et al [5] have calculated the binding energy, for cylindrical and rectangular quantum wire, respectively. El Said et al [6] have estimated the donor polarizability in rectangular wire, assuming that an electric field is applied in the z-direction, chosen as the direction of the electron free motion. Narayani et al [7] have considered a uniform electric field in the direction parallel to the cross-section (plan (x, y)), making an angle θ with the x-axis.…”

Finite-Barrier Height Effect on the Magnetoabsorption of a Shallow Donor in a Quantum Well Wire

“…In the dipole approximation, the absorption coefficient a" hw in a medium of refractive index n is given by [12,13] a" hw 4pe 2 ncm * wV…”

Screening effect on polarizabilities of shallow donors and acceptors in infinite-barrier quantum wells

“…The polarizability in low dimensional semiconducting systems, quantum well (QW), quantum well wire (QWW) and quantum Dot (QOD) have been calculated for shallow donors [7][8][9][10][11][12]. Recently, the effect of screening on the polarizability of shallow donors and acceptors in finite-barrier quantum wells has been studied [13].…”