Diamagnetic susceptibility of a magneto-donor in Inhomogeneous Quantum Dots

Mmadi, A.; Rahmani, Khalid; Zorkani, Izeddine; Jorio, Anouar

doi:10.1016/j.spmi.2013.01.006

Cited by 25 publications

(19 citation statements)

References 29 publications

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“…This indicates that there is a strong influence of the confining potential and dimensions of the dot on the diamagnetic susceptibility. Similar results using different shapes and potentials have been reported by [42,43].…”

Section: Resultssupporting

confidence: 89%

Finite difference calculation of optical properties of hydrogenic impurity in spherical quantum dot with parabolic confinement

Batra

Prasad

2018

Rev. Mex. Fis. E

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The optical properties of an electron with an impurity in a spherical quantum dot under parabolic confinement are studied and energies, wave functions, binding energies, radial matrix elements, polarizability, susceptibility and oscillator strength have been evaluated. The numerical method used is the finite difference method in the framework of the effective mass approximation. The variation of the energy levels and radial matrix elements have been studied as function of the radius of the GaAs sphere and also as function of the frequency of the harmonic oscillator potential or parabolic potential. In addition we have studied how polarizability, susceptibility and the oscillator strength vary as a function of dot radius and at different parabolic potential frequencies.

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Section: Resultssupporting

confidence: 89%

Finite difference calculation of optical properties of hydrogenic impurity in spherical quantum dot with parabolic confinement

Batra

Prasad

2018

Rev. Mex. Fis. E

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“…DMS invariably displays steady drop as B increases [40], [41], [42], [44], [50]. However, at large B , DMS exhibits some sort of steady magnitude [50].…”

Section: Resultsmentioning

confidence: 99%

“…According to the Langevin formula DMS or Larmor DMS (in a.u.) is given by [44], [48]χdia=−e26m⁎εc2〈(r−r0)2〉, where r0 is the dopant coordinate. false〈true(r−r0true)2false〉 stands for the variance of the separation between the impurity and the dot confinement center.…”

Section: Methodsmentioning

confidence: 99%

“…Diamagnetic susceptibility (DMS) is an important magnetic property which has been extensively studied for LDSS doped with impurity. Study of DMS maintains close linkage with development of spintronics, quantum chaos, electronic conductivity and various other technological applications of electronic and optoelectronic devices [34], [35], [36], [37], [38], [39], [40], [41], [42], [43], [44], [45], [46]. Therefore, in view of comprehensive investigation on DMS of LDSS; often, contribution of various physical quantities e.g.…”

Section: Introductionmentioning

confidence: 99%

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Tuning diamagnetic susceptibility of impurity doped quantum dots by noise-binding energy interplay

Arif

Bera

Ghosh

2019

Heliyon

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In the present work we explore the role of noise-binding energy (BE) interplay on the diamagnetic susceptibility (DMS) of doped GaAs quantum dot (QD). Gaussian white noise has been invoked for the above exploration. And Gaussian impurity acts as a dopant in the present study. The mode of inclusion of noise to the system significantly affects the above interplay and thus prominently modulates the DMS profile. The outcomes of the inspection unfolds the way by which DMS of doped QD can be regulated by prudent adjustment of noise-BE interaction.

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“…Akbas et al [36] studied the effects of quantum confinement and the effective mass anisotropy parameter on the diamagnetic susceptibility of a hydrogenic donor placed in GaAs, Si, and Ge quantum wells with infinite confinement potential. Mmadi et al [37] calculated the binding energy and diamagnetic susceptibility for a shallow donor confined to move in a spherical inhomogeneous quantum dot in the presence of a magnetic field. Khordad calculated the diamagnetic susceptibility of a hydrogenic donor impurity in a V-groove GaAs/Ga x Al 1−x As quantum wire [38].…”

Section: Introductionmentioning

confidence: 99%

Energy gap renormalization and diamagnetic susceptibility in quantum wires with different cross-sectional shape

et al. 2016

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In this study, we investigate the effect of the cross-sectional shape on the energy gap renormalization and diamagnetic susceptibility in various quantum wires. To this end, we consider quantum wires with different cross-sectional shapes such as circular, square, hexagonal, and triangular. First, we employ the finite-element method and Arnoldi algorithm to solve the Schrödinger equation. Then, we calculate the energy levels, wavefunctions, binding energy, energy gap renormalization, and diamagnetic susceptibility. Our numerical results show that the binding energy decreases when the cross-sectional area is increased for all the quantum wires. Moreover, it is inferred that the cross-sectional shape is not important for large crosssectional area when calculating the binding energy. Indeed, the main parameter is the cross-sectional area rather than the length of a side. The energy gap renormalization decreases with increasing cross-sectional area, regardless of the impurity concentration. We observe that the highest and lowest energy gap renormalization correspond to triangular and circular quantum wires, respectively. The absolute value of the diamagnetic susceptibility increases with increasing crosssectional area for all the quantum wires investigated.

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Diamagnetic susceptibility of a magneto-donor in Inhomogeneous Quantum Dots

Cited by 25 publications

References 29 publications

Finite difference calculation of optical properties of hydrogenic impurity in spherical quantum dot with parabolic confinement

Finite difference calculation of optical properties of hydrogenic impurity in spherical quantum dot with parabolic confinement

Tuning diamagnetic susceptibility of impurity doped quantum dots by noise-binding energy interplay

Energy gap renormalization and diamagnetic susceptibility in quantum wires with different cross-sectional shape

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