Effect of electric field on confined donor states in laterally coupled quantum rings
Sign Up to like & getrecommendations! Published in 2020 at "Applied Surface Science"
DOI: 10.1016/j.apsusc.2020.145248
Abstract: Abstract We analyzed the confined donor states in elongated laterally coupled double Ga(Al)As craterlike shaped asymmetric quantum rings in the presence of electric and magnetic fields. We described a realistic non-uniform geometry of the structure… read more here.
Keywords: donor states; laterally coupled; quantum rings; confined donor ... See more keywords
Electronic structure and persistent current of hexagonal MoS2 quantum rings: A tight-binding calculations
Sign Up to like & getrecommendations! Published in 2019 at "Solid State Communications"
DOI: 10.1016/j.ssc.2019.113727
Abstract: Abstract The electronic structure and the persistent current of the hexagonal MoS2 quantum rings are investigated within the multi-orbital tight-binding formalism. It is shown that the degenerate energy levels split owing to spin-orbit coupling of… read more here.
Keywords: hexagonal mos2; mos2 quantum; electronic structure; quantum rings ... See more keywords
Interferometry of Klein tunnelling electrons in graphene quantum rings
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Applied Physics"
DOI: 10.1063/1.4973902
Abstract: We theoretically study a current switch that exploits the phase acquired by a charge carrier as it tunnels through a potential barrier in graphene. The system acts as an interferometer based on an armchair graphene… read more here.
Keywords: graphene quantum; quantum rings; interferometry klein; klein tunnelling ... See more keywords
Excess noise in Al x Ga 1 − xAs/GaAs based quantum rings
Sign Up to like & getrecommendations! Published in 2020 at "Applied Physics Letters"
DOI: 10.1063/5.0002247
Abstract: Cross-correlated noise measurements are performed in etched Al x Ga 1 − xAs/GaAs based quantum rings in equilibrium at a bath temperature of T bath = 4.2 K. The measured white noise exceeds the thermal… read more here.
Keywords: gaas based; quantum rings; excess noise; noise ... See more keywords
Quantum Rings Dressed by a High-Frequency Electromagnetic Field
Sign Up to like & getrecommendations! Published in 2018 at "Semiconductors"
DOI: 10.1134/s1063782618140130
Abstract: We demonstrate theoretically that the interaction of quantum rings with a high-frequency off-resonant electromagnetic field (dressing field) substantially renormalizes their electronic properties. Particularly, it is shown that a linearly polarized dressing field decreases the spin… read more here.
Keywords: high frequency; electromagnetic field; field; quantum rings ... See more keywords
Electronic Properties of Hexagonal Graphene Quantum Rings from TAO-DFT
Sign Up to like & getrecommendations! Published in 2022 at "Nanomaterials"
DOI: 10.3390/nano12223943
Abstract: The reliable prediction of electronic properties associated with graphene nanosystems can be challenging for conventional electronic structure methods, such as Kohn–Sham (KS) density functional theory (DFT), due to the presence of strong static correlation effects… read more here.
Keywords: quantum rings; graphene quantum; hexagonal graphene; tao dft ... See more keywords
Spin–Orbit and Zeeman Effects on the Electronic Properties of Single Quantum Rings: Applied Magnetic Field and Topological Defects
Sign Up to like & getrecommendations! Published in 2023 at "Nanomaterials"
DOI: 10.3390/nano13091461
Abstract: 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… read more here.
Keywords: quantum rings; single quantum; spin orbit; magnetic field ... See more keywords
Exciton–Exciton Interactions in Coaxial Double Quantum Rings
Sign Up to like & getrecommendations! Published in 2019 at "Nanomaterials"
DOI: 10.3390/nano9101469
Abstract: We study theoretically the quantum states of two interacting excitons in coaxial double quantum rings. An interplay between exciton–exciton Coulomb interactions and specific geometry of the structure leads to the emergence of peculiar energy spectrum… read more here.
Keywords: coaxial double; quantum rings; double quantum; exciton interactions ... See more keywords
Carrier Relaxation Dynamics Between Localized Vertical Confinement States in GaAs/AlGaAs Quantum Rings
Sign Up to like & getrecommendations! Published in 2018 at "Journal of the Korean Physical Society"
DOI: 10.3938/jkps.73.314
Abstract: We have performed time-resolved photoluminescence of dilute GaAs/AlGaAs quantum rings for increasing excitation and temperature. Although a large distance between quantum rings (200 ± 50 nm) prevents a ring-to-ring carrier transport, a decay time difference… read more here.
Keywords: carrier relaxation; quantum rings; carrier; gaas algaas ... See more keywords