Rashba spin orbit interaction effect on nonlinear optical properties of quantum dot with magnetic field

Jha, Pradip K.; Kumar, Manoj; Lahon, Siddhartha; Gumber, Sukirti; Mohan, Man

doi:10.1016/j.spmi.2013.10.025

Cited by 24 publications

(5 citation statements)

References 27 publications

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“…Next we will derive the OACs and RICs in spherical QD by the compactdensity-matrix method and the iterative procedure. The analytical expressions of the linear and the third-order nonlinear susceptibilities for a two-level quantum system are given as follows [9,19,20,21]. First, for the linear term, ε 0 χ (1)…”

Section: Theorymentioning

confidence: 99%

Donor-impurity-related optical absorption and refractive index changes in GaAs/AlGaAs core/shell spherical quantum dots

Zhang

Zhuang

Guo

et al. 2016

Superlattices and Microstructures

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In this study, the linear and nonlinear intersubband optical absorption coefficients (OACs) and refractive index changes (RICs) in GaAs/AlGaAs core/shell spherical quantum dots (QDs) are theoretically investigated within the framework of the compact-density-matrix approach and iterative method for both cases with and without on-center impurity. The energy eigenvalues and their corresponding eigenfunctions of the system are calculated by using the differential method. Our results show that the position and the magnitude of the resonant peaks of the nonlinear OACs and RICs depend strongly on the hydrogenic impurity and QDs radius. It was found that the total OACs indicates saturation at sufficiently high incident intensities. Also we found that the binding energy of the ground and excited states of the impurity depend on the QDs radius.

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Section: Theorymentioning

confidence: 99%

Donor-impurity-related optical absorption and refractive index changes in GaAs/AlGaAs core/shell spherical quantum dots

Zhang

Zhuang

Guo

et al. 2016

Superlattices and Microstructures

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“…The advancements in semiconductor technology have made it feasible to develop structures with features that are particularly sensitive to heterostructure confinement, which has piqued interest. For example, by using an external magnetic field, the electronic states of the carriers confined in the quantum dot (QD) may be significantly altered [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. This important topic has been well researched.…”

Section: Introductionmentioning

confidence: 99%

The Gaussian impurity effect on the electronic and magnetic properties of an electron confined in a lateral quantum dot

Shaer¹,

Elsaid²

2022

Nanosystems: Phys. Chem. Math.

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The Hamiltonian of a single electron trapped in a lateral quantum dot in the influence of an acceptor Gaussian impurity has been solved using a variational wavefunction as a superposition of a product of eigenfunctions of the harmonic oscillator in x and y coordinates. The effects of Gaussian impurity parameters on the system's spectra have been investigated as a function of the magnetic field. Furthermore, the electron probability has been displayed to investigate the impurity position effect on the energy levels. As a second step, the calculated energy spectra were utilized to compute and visualize the system's magnetic properties in the presence of the magnetic field and impurity. The obtained energy spectra show level crossings in the presence of acceptor impurity, which causes oscillations in the magnetic susceptibility and magnetization curves, resulting in an exciting diamagnetic-paramagnetic phase transition. KEYWORDS lateral quantum dot, magnetic properties, Gaussian impurity, diamagnetic-paramagnetic transition FOR CITATION Shaer A., Elsaid M.K. The Gaussian impurity effect on the electronic and magnetic properties of an electron confined in a lateral quantum dot.

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“…Energy levels are directly affected by spin-orbit coupling; its influence is realized in all electronic, optical and physical properties of the system including thermodynamics. [28,29] There have been several experimental and theoretical studies devoted to the thermodynamic properties of quantum structures, [30][31][32][33][34][35][36][37] but the theoretical understanding of the effect of SOI on these properties is still in its infancy. Gornik et al [30] have reported the first observation of magnetic-fielddependent specific heat (C v ) in quasi two-dimensional objects.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic behaviour of Rashba quantum dot in the presence of magnetic field

et al. 2016

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The thermodynamic properties of an InSb quantum dot have been investigated in the presence of Rashba spin-orbit interaction and a static magnetic field. The energy spectrum and wave-functions for the system are obtained by solving the Schrodinger wave-equation analytically. These energy levels are employed to calculate the specific heat, entropy, magnetization and susceptibility of the quantum dot system using canonical formalism. It is observed that the system is susceptible to maximum heat absorption at a particular value of magnetic field which depends on the Rashba coupling parameter as well as the temperature. The variation of specific heat shows a Schottky-like anomaly in the low temperature limit and rapidly converges to the value of 2k B with the further increase in temperature. The entropy of the quantum dot is found to be inversely proportional to the magnetic field but has a direct variation with temperature. The substantial effect of Rashba spin-orbit interaction on the magnetic properties of quantum dot is observed at low values of magnetic field and temperature.

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Rashba spin orbit interaction effect on nonlinear optical properties of quantum dot with magnetic field

Cited by 24 publications

References 27 publications

Donor-impurity-related optical absorption and refractive index changes in GaAs/AlGaAs core/shell spherical quantum dots

Donor-impurity-related optical absorption and refractive index changes in GaAs/AlGaAs core/shell spherical quantum dots

The Gaussian impurity effect on the electronic and magnetic properties of an electron confined in a lateral quantum dot

Thermodynamic behaviour of Rashba quantum dot in the presence of magnetic field

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