Analysis of the eigenstates of a semiconductor hydrogenic washer-shaped structurally deformed nanoring: External crossed fields and stark-like effects

Castrillón, Jhonny; Fulla, M.R.; Marín, J.H.; Fonnegra-García, D.; Suaza, Y.A.; Salazar-Santa, J.D.

doi:10.1016/j.physb.2017.06.036

Cited by 8 publications

(2 citation statements)

References 29 publications

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“…In general, Equation (14) shows that it is not intuitive to predict the behavior of dipole moments, which definitely involves the symmetries of the real and imaginary parts of each spinor in each of the two wave functions involved in the matrix element. Let us analyze a particular case that corresponds to the study system with n = 4, where two hills are located along the x-axis (at θ = 0, dot 1, and at θ = π, dot 3) and two along the y-axis (at θ = π/2, dot 2, and at θ = 3 π/2, dot 4).…”

Section: Magnetic Field (T) Energymentioning

confidence: 99%

“…[7] reveals the presence of multiple such bulges in the case of InP-based systems, to the extent that the obtained structures are referred to as annular quantum dot molecules. Some previous attempts have theoretically modeled the confinement profiles of such deformed QRs by proposing specific mathematical functions [14,15]. The model in [15] embodies a simple expression that allows tuning the position, number, and height of those dot-like bulges in the multi-hilled structure.…”

Section: Introductionmentioning

confidence: 99%

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Elliptical Quantum Rings with Variable Heights and under Spin–Orbit Interactions

Mora-Ramos,

Vinasco,

Radu

et al. 2023

Condensed Matter

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We investigate the electronic properties of a semiconductor quantum ring with an elliptical shape and non-uniform height, allowing for distributed quantum-dot-like bulges along its perimeter. The adiabatic approximation and the finite element method are combined to calculate the allowed electron states in the structure under the effective mass approximation, considering the contributions from Rashba and Dresselahaus spin–orbit interactions and the Zeeman effect in the presence of an applied magnetic field. We discuss the features of the calculated spectra for two different ring geometries: a symmetric one with four dot-like bulges, and an asymmetric one with three hilled protuberances. The information about those states allows us to evaluate the linear optical absorption response associated with interlevel transitions between the ground and lowest excited states. This phenomenon takes place at resonant energies of only a few milielectronvolts. It is observed that spin–orbit interactions tend to quench this response under zero-field conditions in the case of symmetric confinement.

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Section: Magnetic Field (T) Energymentioning

confidence: 99%