Binding energy and photoionization cross section of hydrogen-like donor impurity in quantum well-wire in electric and magnetic fields

Mughnetsyan, Vram; Barseghyan, M.G.; Kirakosyan, A.A.

doi:10.1016/j.spmi.2008.02.009

Cited by 44 publications

(15 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The photoionization cross section of a hydrogenic impurity in low-dimensional structures was studied by many authors [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Mughnetsyan et al [14] have studied the effect of uniform electric and magnetic fields on binding energy and photoionization cross section of an off-axis hydrogenic donor impurity in a quantum well wire in the cases when the polarization vector of incident radiation is parallel and perpendicular to the wire axis. Morales et al [15] have investigated the photoionization cross section of a shallow donor impurity in asymmetric double quantum wells under the simultaneous effects of hydrostatic pressure and growth-direction applied electric fields.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photoionization cross-section of donor impurity in spherical quantum dots under electric and intense laser fields

Burileanu

2014

Journal of Luminescence

View full text Add to dashboard Cite

“…The photoionization cross section of a hydrogenic impurity in low-dimensional structures was studied by many authors [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photoionization cross-section of donor impurity in spherical quantum dots under electric and intense laser fields

Burileanu

2014

Journal of Luminescence

View full text Add to dashboard Cite

“…The knowledge of the properties of electrical and optical phenomena associated with shallow-donor impurities is of topmost importance in bulk semiconductors and in semiconducting low-dimensional systems. In this sense, the investigation of impurity-related effects in QWWs can show a number of publications [8,11,12,[14][15][16][17]. These reports deal with different physical features such as the influence of the QWW cross section geometry, application of electric and magnetic fields, dielectric constant mismatch, position-dependence of the effective mass, hydrostatic pressure and temperature effects, and diamagnetic susceptibility.…”

Section: Introductionmentioning

confidence: 99%

Impurity-related linear and nonlinear optical response in quantum-well wires with triangular cross section

Duque

Mora-Ramos

Kasapoğlu

et al. 2013

Journal of Luminescence

View full text Add to dashboard Cite

The 1s-like and 2p-like donor impurity energy states are studied in a semiconductor quantum wire of equilateral triangular cross section as functions of the impurity position and the geometrical size of the structure. Linear and nonlinear coefficients for the optical absorption and relative refractive index change associated with 1s-2p transitions are calculated for both the x-polarization and y-polarization of the incident light. The results show a mixed effect of redshift and blueshift depending on the location of the donor atom. Also, strong nonlinear contributions to the optical absorption coefficient are obtained for both polarizations in the on-center impurity case.

show abstract

“…A variety of studies have been reported on the combined effects of electric and magnetic fields on impurity states in QWW with different geometries 36–38. Coaxial QWW have been considered with circular and rectangular cross sections, and rectangular (abrupt potential barriers) and parabolic potential barriers with on‐axis and off‐axis donor and/or acceptor impurities have been taken into account.…”

Section: Introductionmentioning

confidence: 99%

Shallow-donor impurity in coupled GaAs/Ga1−xAlxAs quantum well wires: hydrostatic pressure and applied electric field effects

Tangarife

Duque

2010

phys. stat. sol. (b)

View full text Add to dashboard Cite

In this work we study the binding energy of the ground state for hydrogenic donor impurity in laterally coupled GaAs/ Ga 1Àx Al x As double quantum well wires, considering the effects of hydrostatic pressure and under the influence of a growthdirection applied electric field. We have used a variational method and the effective mass and parabolic band approximations. The low dimensional structure consists of two quantum well wires with rectangular transversal section coupled by a central Ga 1Àx Al x As barrier. In the study of the effect of hydrostatic pressure, we have considered the G -X crossover in the Ga 1Àx Al x As material, which is responsible for the reduction of the height of the confining potential barriers. Our results are reported for several sizes of the structure (transversal sections of the wires and barrier thickness), and we have taken into account variations of the impurity position along the growth-direction of the heterostructure, together with the influence of applied electric fields. The main findings can be summarized as: (i) for symmetric quantum-well wires (QWW) the binding energy is an even function of the growth-direction impurity position and this even symmetry breaks in the case of asymmetric structures; (ii) the coupling between the two parallel wires increases with the hydrostatic pressure due to the negative slope of the confinement potential as a function of pressure; (iii) for impurities in the central barrier the binding energy is an increasing function of the hydrostatic pressure; (iv) depending on the direction of the applied electric field and the fixed impurity position, the binding energy can behave as an increasing or decreasing step function of the applied electric field, and finally (v) for appropriate values of the wires and barrier widths the results reproduce the exact limits of 2D and 3D hydrogenic atom as well as the limits of finite and infinite potential barrier quantum wells.

show abstract

Binding energy and photoionization cross section of hydrogen-like donor impurity in quantum well-wire in electric and magnetic fields

Cited by 44 publications

References 32 publications

Photoionization cross-section of donor impurity in spherical quantum dots under electric and intense laser fields

Photoionization cross-section of donor impurity in spherical quantum dots under electric and intense laser fields

Impurity-related linear and nonlinear optical response in quantum-well wires with triangular cross section

Shallow-donor impurity in coupled GaAs/Ga1−xAlxAs quantum well wires: hydrostatic pressure and applied electric field effects

Contact Info

Product

Resources

About