Diamagnetic susceptibility of a hydrogenic donor in a quantum dot

Reuben, A. Merwyn Jasper D.; Jayakumar, K.

doi:10.1002/pssb.200642091

Cited by 20 publications

(2 citation statements)

References 16 publications

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“…Thus, the impurity driven modulation of linear and nonlinear optical properties has persistently gained importance because of emerging applications in photodetectors and high-speed electro-optical devices [11]. Naturally, a good number of theoretical and experimental works have been conducted on both linear and nonlinear optical properties of these structures [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Application of electric field furnishes important information about the confined impurities [27].…”

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confidence: 99%

Exploring static and frequency-dependent third nonlinear polarizability of doped quantum dots driven by Gaussian white noise

Ganguly¹,

Ghosh

2014

Phys. Status Solidi B

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We investigate the profiles of diagonal components of static and frequency‐dependent third nonlinear (γxxxx, γyyyy) polarizability of repulsive impurity doped quantum dots driven by noise. The dopant impurity potential is represented by a Gaussian function. We have invoked Gaussian white noise applied additively and multiplicatively (in Stratonovich sense). In order to determine the polarizability components, the doped system is subject to an external electric field of given intensity, which may be static or time‐dependent. The dopant location and the noise characteristics delicately tailor the polarizability components and produce good number of interesting outcomes. Quiet significantly, we have found ineffectiveness of the noise strength in influencing the polarizability components when the noise is applied additively. However, the multiplicative noise behaves otherwise and gives rise to additional interesting features in the polarizability profiles. The multiplicative noise even causes noticeable enhancement in the magnitude of the polarizability components. The present enquiry gains importance in view of the fact that noise seriously affects the optical properties of doped quantum dot devices. The findings could be relevant within the purview of noise driven optical properties of doped quantum dot systems.

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confidence: 99%

Exploring static and frequency-dependent third nonlinear polarizability of doped quantum dots driven by Gaussian white noise

Ganguly¹,

Ghosh

2014

Phys. Status Solidi B

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“…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.…”

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confidence: 99%

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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Effect of magnetic field on diamagnetic susceptibility of two interacting electrons in a quantum dot

Radhakrishnan

Peter

2011

Int J of Quantum Chemistry

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ABSTRACT:We have estimated the energy levels of the low-lying states as a function of magnetic field when two electrons are introduced in a quantum dot (QD). Oscillator strength of interacting electrons for different magnetic field strengths has been calculated. There is no appreciable change in oscillator strength for stronger confinements for all the magnetic field strengths. We present the shift of diamagnetic susceptibility of a hydrogenic donor impurity in GaAs/Ga 1Àx Al x As QD systems for the ground and low lying excited states. The effect of magnetic field on diamagnetic susceptibilities is estimated by two different methods and it has been found that values obtained from both the methods resemble each other. The diamagnetic shift is in good agreement with the other investigators.

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Diamagnetic susceptibility of a hydrogenic donor in a quantum dot

Cited by 20 publications

References 16 publications

Exploring static and frequency-dependent third nonlinear polarizability of doped quantum dots driven by Gaussian white noise

Exploring static and frequency-dependent third nonlinear polarizability of doped quantum dots driven by Gaussian white noise

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

Effect of magnetic field on diamagnetic susceptibility of two interacting electrons in a quantum dot

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