Effect of donor impurity dislocation in elliptical quantum rings

Salehani, Hojjatollah K.; Shakouri, Kh.; Esmaeilzadeh, Mahdi

doi:10.1016/j.physb.2014.11.093

Cited by 8 publications

(2 citation statements)

References 27 publications

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“…The interesting characteristic in these panels is the Non-continuous straight horizontal variation of the energy levels as a function of the external magnetic flux in some flux ranges (these are the Non-continuous flux-invariant energy levels). We note that the continuous flux-invariant energy levels are reported elsewhere 52 , in panel (A) of Figs. 7 or 11 .…”

Section: Resultsmentioning

confidence: 53%

Persistent currents and electronic properties of Mandelbrot quantum rings

Tehrani

Solaimani

2023

Sci Rep

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In this study, we investigate the persistent current, and electronic energy levels of Mandelbrot quantum rings. For this purpose, three types of Mandelbrot quantum rings are proposed. Furthermore, Mandelbrot equation is generalized by introducing parameter m, which makes Mandelbrot’s shape more symmetric by adding new branches to it, on the other hand, the iteration parameter M, controls geometrical deficiencies. We explain the procedure needed to form these structures, including a padding scheme, then we solve the resulting two-dimensional Schrodinger equation using the central finite difference method with uniform distribution of the mesh points. Thereafter, we obtain the persistent current in different situations including different Mandelbrot orders and quantum ring shapes. We show that the persistent current can have different shapes and intensities by changing the described geometrical parameters of Mandelbrot quantum rings. We explain this phenomenon by considering symmetries in the potential, and consequently the wavefunction.

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Section: Resultsmentioning

confidence: 53%

Persistent currents and electronic properties of Mandelbrot quantum rings

Tehrani

Solaimani

2023

Sci Rep

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“…A special use for THz range devices is the detection of explosives at a distance, since the substances that usually compose them have a response at those frequencies 35 . In addition, some studies related to impurities in two dimensional elliptical quantum rings have been carried out focusing on their influence on persistent current features 10,36,37 .…”

Section: Introductionmentioning

confidence: 99%

Effects of Geometry on the Electronic Properties of Semiconductor Elliptical Quantum Rings

Vinasco

Radu

Kasapoğlu

et al. 2018

Sci Rep

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The electronic states in GaAs-AlxGa1−xAs elliptically-shaped quantum rings are theoretically investigated through the numerical solution of the effective mass band equation via the finite element method. The results are obtained for different sizes and geometries, including the possibility of a number of hill-shaped deformations that play the role of either connected or isolated quantum dots (hills), depending on the configuration chosen. The quantum ring transversal section is assumed to exhibit three different geometrical symmetries - squared, triangular and parabolic. The behavior of the allowed confined states as functions of the cross-section shape, the ring dimensions, and the number of hills-like structures are discussed in detail. The effective energy bandgap (photoluminescence peak with electron-hole correlation) is reported as well, as a function of the Al molar fraction.

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Effects of hydrogenic impurity and external fields on the optical absorption in a ring-shaped elliptical quantum dot

Ghajarpour-Nobandegani

Karimi

2018

Optical Materials

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Effect of donor impurity dislocation in elliptical quantum rings

Cited by 8 publications

References 27 publications

Persistent currents and electronic properties of Mandelbrot quantum rings

Persistent currents and electronic properties of Mandelbrot quantum rings

Effects of Geometry on the Electronic Properties of Semiconductor Elliptical Quantum Rings

Effects of hydrogenic impurity and external fields on the optical absorption in a ring-shaped elliptical quantum dot

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