Electronic and optical properties of eccentric quantum ring under parallel magnetic field

Nasri, Djillali

doi:10.1016/j.physb.2021.413077

Cited by 11 publications

(3 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Including external effects such as magnetic and electric fields has evidenced the loss of degeneracies, which improves the possibilities of finding behaviors different from those exhibited only by confinement. Such is the case in [15,16], where the breaking degeneration is observed because of magnetic field influence. In [17], the effects on direct and indirect exciton are studied in vertically coupled QRs under the application of an electric field, generating a triangular shape potential.…”

Section: Introductionmentioning

confidence: 96%

Spin–Orbit and Zeeman Effects on the Electronic Properties of Single Quantum Rings: Applied Magnetic Field and Topological Defects

et al. 2023

View full text Add to dashboard Cite

Within the framework of effective mass theory, we investigate the effects of spin–orbit interaction (SOI) and Zeeman splitting on the electronic properties of an electron confined in GaAs single quantum rings. Energies and envelope wavefunctions in the system are determined by solving the Schrödinger equation via the finite element method. First, we consider an inversely quadratic model potential to describe electron confining profiles in a single quantum ring. The study also analyzes the influence of applied electric and magnetic fields. Solutions for eigenstates are then used to evaluate the linear inter-state light absorption coefficient through the corresponding resonant transition energies and electric dipole matrix moment elements, assuming circular polarization for the incident radiation. Results show that both SOI effects and Zeeman splitting reduce the absorption intensity for the considered transitions compared to the case when these interactions are absent. In addition, the magnitude and position of the resonant peaks have non-monotonic behavior with external magnetic fields. Secondly, we investigate the electronic and optical properties of the electron confined in the quantum ring with a topological defect in the structure; the results show that the crossings in the energy curves as a function of the magnetic field are eliminated, and, therefore, an improvement in transition energies occurs. In addition, the dipole matrix moments present a non-oscillatory behavior compared to the case when a topological defect is not considered.

show abstract

Section: Introductionmentioning

confidence: 96%

Spin–Orbit and Zeeman Effects on the Electronic Properties of Single Quantum Rings: Applied Magnetic Field and Topological Defects

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The shape of QR together with the geometrical parameters and the applied external fields lead the changes in the potential profile of QR and so the optical properties. The effect of eccentricity on the electronic spectrum of QRs is handled in some studies [1][2][3][4][5][6][7][8]. In addition to deviations from circular curves of QRs, the exposure to electric field [1][2][3][4][5] and magnetic field [6][7][8] have been impressively used to tailor the electronic properties.…”

Section: Introductionmentioning

confidence: 99%

“…The effect of eccentricity on the electronic spectrum of QRs is handled in some studies [1][2][3][4][5][6][7][8]. In addition to deviations from circular curves of QRs, the exposure to electric field [1][2][3][4][5] and magnetic field [6][7][8] have been impressively used to tailor the electronic properties. Chakraborty and co-workers present the possibility of tuning the electronic spectrum by adjusting the ring radius, ring shape and as well as exposing the QR intense laser fields and external magnetic fields [9].…”

Section: Introductionmentioning

confidence: 99%