Tuning the dynamics of Bound Magnetic Polaron in asymmetric Cd1-x1Mnx1Te/Cd1-x2Mnx2Te Semimagnetic Concentric Double Quantum Rings: Through magnetic ion concentration and magnetic field

Sherly, I. Janet; Nithiananthi, P.

doi:10.1016/j.physb.2020.412615

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…The trial wavefunction of the exciton is given by The physical parameters are calculated in atomic units (where e = ħ = m 0 = 1) and they are later converted to SI units. Table 1 gives the material parameters used in the calculation [9][10][11].…”

Section: Theoretical Formalismmentioning

confidence: 99%

“…Quantum heterostructures subjected to an electric field are more interesting because of the interplay between the electric field and dimensional effect which significantly affects the carrier dynamics. Characteristics of carriers trapped inside CdTe/CdMnTe heterostructures under the application of magnetic field has been extensively studied [10]. Spin and energy transfer from the photogenerated carriers to the metal ions provides route to the production of next generation structures and devices.…”

Section: Introductionmentioning

confidence: 99%

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Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO₂ matrix

Sherly,

Nithiananthi

2024

Phys. Scr.

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Effect of electric field and ring dimension on the localization of direct and indirect exciton formed inside a CdTe/CdMnTe Concentric Double Quantum Ring (CDQR) has been studied using variational technique. The whole double ring structure is embedded inside a SiO2 matrix to enhance exciton localization. Electric field applied along the axial (z) axis tilts the band structure which promotes the carrier localization more in the edges than in the center of the ring. Thus, the stronger electric field gives a triangular confinement to the carrier in the edges which enhances the carrier stability. Along with the effect of electric field the ring dimension which determines the stability of the exciton retains has been estimated through the mean square distance. The effect of the location of the constituent carriers on the excitonic stability and the efficient carrier transfer from inner ring to outer ring has been calculated for both symmetric and asymmetric ring dimensions. Height of the ring has been varied to understand its effect on the localization of both direct and indirect exciton.

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Section: Theoretical Formalismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO₂ matrix

Sherly,

Nithiananthi

2024

Phys. Scr.

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“…Donmez et al [16] performed magnetotransport measurements to evaluate the influences of thermal annealing and Bi on the electronic transport characteristics of n-type modulation-doped AlGaAs/GaAsBi QWs. These research works evaluated the effects of different parameters, such as the magnetic field [17], electric field [18], hydrogen-like impurity field [19], temperature [20], and laser field [21], and found that only one or two of them had important influences on polarons in QWs.…”

Section: Introductionmentioning

confidence: 99%

The Impurity and Decay-Magnetic Polaron Effects in III–V Compound Gaussian Quantum Wells

Zhang

et al. 2022

Coatings

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The effects of a decay magnetic field and hydrogen-like impurities on the ground-state binding energy (GSBE) and ground-state energy (GSE) of weak-coupling bound polarons in asymmetrical Gaussian potential (AGP) III–V compound quantum wells (QWs) were studied based on unitary transformation methods and linear combination operators. By numerical calculation, we found that the polarons were affected by the AGP, the decay magnetic field, Coulomb impurities, and the type of crystal, which led to a series of interesting phenomena, such as changes in the ground-state energy and the ground-state binding energy. The results obtained provide good theoretical guidance for optoelectronic devices and quantum information.

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“…In this sense, it is possible to mention the work by Wu and collaborators 36 as well as those by Cattapan and Lotti 37 and Escorcia et al 38 in laterally aligned QR systems. Electronic and exciton properties in concentric double rings have been the subject of research in 39 – 41 . Vertically stacked quantum rings have been considered, for example, in the works of Refs.…”

Section: Introductionmentioning

confidence: 99%

Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach

Vinasco

Laroze

Radu

et al. 2021

Sci Rep

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We theoretically investigate the electron and hole states in a semiconductor quantum dot-quantum ring coupled structure, inspired by the recent experimental report by Elborg and collaborators (2017). The finite element method constitutes the numerical technique used to solve the three-dimensional effective mass equation within the parabolic band approximation, including the effects of externally applied electric and magnetic fields. Initially, the features of conduction electron states in the proposed system appear discussed in detail, under different geometrical configurations and values of the intensity of the aforementioned electromagnetic probes. In the second part, the properties of an electron-hole pair confined within the very kind of structure reported in the reference above are investigated via a model that tries to reproduce as close as possible the developed profile. In accordance, we report on the energies of confined electron and hole, affected by the influence of an external electric field, revealing the possibility of field-induced separate spatial localization, which may result in an indirect exciton configuration. In relation with this fact, we present a preliminary analysis of such phenomenon via the calculation of the Coulomb integral.

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Tuning the dynamics of Bound Magnetic Polaron in asymmetric Cd1-x1Mnx1Te/Cd1-x2Mnx2Te Semimagnetic Concentric Double Quantum Rings: Through magnetic ion concentration and magnetic field

Cited by 8 publications

References 7 publications

Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO₂ matrix

Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO₂ matrix

The Impurity and Decay-Magnetic Polaron Effects in III–V Compound Gaussian Quantum Wells

Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach

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Tuning the dynamics of Bound Magnetic Polaron in asymmetric Cd1-x1Mnx1Te/Cd1-x2Mnx2Te Semimagnetic Concentric Double Quantum Rings: Through magnetic ion concentration and magnetic field

Cited by 8 publications

References 7 publications

Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO2 matrix

Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO2 matrix

The Impurity and Decay-Magnetic Polaron Effects in III–V Compound Gaussian Quantum Wells

Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach

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Product

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Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO₂ matrix

Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO₂ matrix