Electric and magnetic field effects on the binding energy of a hydrogenic donor impurity in a coaxial quantum well wire

Aktaş, Ş.; Boz, F.K.; Dalgic, S. Sentürk

doi:10.1016/j.physe.2005.02.002

Cited by 55 publications

(10 citation statements)

References 33 publications

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“…, ε 0 is the ground state energy in the absence of an impurity and electric field [27], F(−a 0 , 1; γ t 2 /2) and U (−b 0 , 1; γ t 2 /2) are the degenerate hypergeometric functions [28]. Note that in Eq.…”

Section: Binding Energymentioning

confidence: 99%

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

Mughnetsyan

Barseghyan

Kirakosyan

2008

Superlattices and Microstructures

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Section: Binding Energymentioning

confidence: 99%

“…Note that in Eq. (4) it is necessary to substitute the value of the variational parameter α = α 0 , corresponding to the minimum value of the ground state energy in the presence of an electric field: ε 1 = ψ 1 (t, ϕ; α)|Ĥ 1 |ψ 1 (t, ϕ; α) [27]. The ground impurity state wave function is expressed by…”

Section: Binding Energymentioning

confidence: 99%

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

Mughnetsyan

Barseghyan

Kirakosyan

2008

Superlattices and Microstructures

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“…The heterostructure has been intensively investigated due to its potential applications in optoelectronic devices and solar energy harvesting . A lot of authors investigated the effects of an impurity on electronic properties of CQWWs . A variational procedure is frequently used to calculate the ground‐state binding energies which are found to be dependent on the system geometries, height, and thickness of potential barriers, and positions of an impurity.…”

Section: Introductionmentioning

confidence: 99%

Coaxial Quantum Well Wires in Magnetic/Nonmagnetic Heterostructures

Sangtawee

Srikom

Amthong

2018

Physica Status Solidi (b)

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We propose a coaxial cylindrical quantum well wire which is composed of layers of a dilute magnetic semiconductor (DMS) and a nonmagnetic semiconductor (NMS). Using effective mass approximation, we present a numerical calculation of the eigenenergies and eigenstates of electrons in the heterostructure. The variation of the spin‐dependent energy levels is influenced by the giant Zeeman splitting and potential energies due to a vector potential for sufficiently low and high magnetic fields, respectively. It is found that crossing and anticrossing behaviors of energy levels can be controlled by the thickness of a NMS layer. The ballistic transport of the structure is also investigated. The ranges of the Fermi energy for obtaining full spin polarization are suggested in this work.

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Both electric and magnetic field effects of shallow donor impurities have been theoretically investigated. [17][18][19][20] Aktas and coworkers calculated the binding energy as a function of impurity position and barrier thickness for various values of the applied magnetic and electric fields in a coaxial GaAs-Ga, Al As QWW. 17,18 Ribeiro et al 19 analyzed the interplay between the confinement effects due to the applied fields and the quantum-size confinements on the binding energies, and discussed the role played by the impurity position along the well direction on the impurity energies in cylindrical QDs with a lateral parabolic potential and a square-well potential in the z direction via a variational approach.…”

Section: Introductionmentioning

confidence: 99%

Binding Energies of Hydrogenic Impurities on-Center and Off-Center in Cylindrical Quantum Dots Under Electric and Magnetic Fields

Wang

Wei

2010

Int. J. Mod. Phys. B

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The ground-state binding energies of a hydrogenic impurity in cylindrical quantum dots (QDs) subjected to external electric and magnetic fields are investigated using the finitedifference method within the quasi-one-dimensional effective potential model. The QD is modeled by superposing a square-well potential and a strong lateral confinement potential by the combination of a parabolic potential and a changeable magnetic field. We define an effective radius of a cylindrical QD which can describe the strength of the lateral confinement. The effects of the electric fields are less important when the effective radius is very tiny, and the effects are manifested as the effective radius increases. Meanwhile, one finds that the binding energies highly depend on the impurity positions under the applied transverse fields. When the impurity is located at the right half of the cylinder, the electric field pushes the electron to the left side, then the binding energy decreases; when the impurity is located at the left, the binding energy first increases and reaches a peak value, then deceases with the electric field.

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Electric and magnetic field effects on the binding energy of a hydrogenic donor impurity in a coaxial quantum well wire

Cited by 55 publications

References 33 publications

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

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

Coaxial Quantum Well Wires in Magnetic/Nonmagnetic Heterostructures

Binding Energies of Hydrogenic Impurities on-Center and Off-Center in Cylindrical Quantum Dots Under Electric and Magnetic Fields

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