Optical properties of type-I PbSe/CdSe core/shell quantum dot

Saravanamoorthy, Somasundaram; Peter, A. John; Lee, Chang Woo

doi:10.1016/j.physb.2015.04.005

Cited by 10 publications

(2 citation statements)

References 30 publications

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“…Afterwards, Cristea and Niculescu [36] have reported the electronic properties of a spherical Si QD with dielectric border, considering the dielectric mismatch at the core/shell interface, using a finite element method with triangular element and variable steps. Such kinds of systems with various material types such as inverted and non inverted CdSe/ZnS [37], type-I PbSe/CdSe CSQD [38] and recently, inverted and non inverted CdSe/ZnTe [39], have been subject of numerous studies taking into consideration various types of external constraints. Chafai et al [19] have focused their attention on the effects of the magnetic field on energy levels and ground state binding energies of a CdSe/ZnTe CSQD with an on-center hydrogenic impurity; they found a noticeable modification of those properties as a result of the external magnetic field action notably the increase of the electron energy.…”

Section: Introductionmentioning

confidence: 99%

Binding energies, oscillator strengths of core/shell spherical quantum dots with or without on- or off-center donor impurities under an external magnetic field

Aboulaï¹,

Melono²,

Doba³

et al. 2022

Phys. Scr.

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Non-relativistic energy levels, binding energies and oscillator strengths of CdSe⁄ZnT e core/shell spherical quantum dots with or without impurities submitted to an external magnetic ﬁeld have been investigated by using a B-spline based variational method, within the framework of the eﬀective mass approximation. In the case where the system contains hydrogenic impurity, the eﬀects of its oﬀ-center displacement combined to the height of the conﬁning potential have also been studied. The dielectric constant as well as the eﬀective mass are considered to be dependent on the radius. The modiﬁcations occurring due to the presence of the magnetic ﬁeld have been analyzed. We have found that the electronic and optical properties are strongly aﬀected by the magnetic ﬁeld strength, the spatial conﬁnement and the oﬀ-center displacement. The oscillator strengths and the binding energies increase with the magnetic ﬁeld, but its eﬀect on the binding energies (both ground and excited states) is dimmed by the reduction of the core-to-shell radii ratio and the increase of the oﬀ-center displacement to the vicinity of the shell. However, the oscillator strengths increase with the magnetic ﬁeld when the oﬀ-center displacement increases towards the shell.

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Section: Introductionmentioning

confidence: 99%

Binding energies, oscillator strengths of core/shell spherical quantum dots with or without on- or off-center donor impurities under an external magnetic field

Aboulaï¹,

Melono²,

Doba³

et al. 2022

Phys. Scr.

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“…In these studies, the possibility to control the thermodynamic and magnetic properties of the electron gas by way of changing the geometric parameters of the QD was demonstrated. In this regard, it should be noted that in recent years the attention is greatly increased to the QD with the layered geometry: quantum rings, spherical and cylindrical systems (core/shell/shell) [13][14][15][16][17][18]. In such structures, the manipulation of the electron energy levels can be done by changing the external and internal radii.…”

Section: Introductionmentioning

confidence: 99%

Diamagnetic susceptibility of the electron gas in the cylindrical nanolayer

2016

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Abstract⎯Diamagnetic properties of the electron gas in cylindrical nanolayer have been investigated. The dependence of mean energy, mean magnetization and mean magnetic susceptibility on the values of magnetic field is obtained. Comparison of these dependencies with the case, when the electron gas is localized in the cylindrical quantum dot, is carried out. In a nanolayer, the character of an effect of size quantization on the magnetic properties of the electron gas has been revealed.

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