Zobrazeno 1 - 10
of 128
pro vyhledávání: '"A. Vram"'
Autor:
Gudmundsson, Vidar, Mughnetsyan, Vram, Goan, Hsi-Sheng, Chai, Jeng-Da, Abdullah, Nzar Rauf, Tang, Chi-Shung, Moldoveanu, Valeriu, Manolescu, Andrei
We model a spin-phase transition in a two-dimensional square array, or a lateral superlattice, of quantum rings in an external perpendicular homogeneous magnetic field. The electron system is placed in a circular cylindrical far-infrared photon cavit
Externí odkaz:
http://arxiv.org/abs/2411.13176
The equilibrium properties and interminiband transitions for Hartree-interacting two-dimensional electron gas in a one-dimensional chain of planar quantum rings subjected to a transverse homogeneous magnetic field are examined theoretically and numer
Externí odkaz:
http://arxiv.org/abs/2410.01509
Autor:
Gudmundsson, Vidar, Mughnetsyan, Vram, Goan, Hsi-Sheng, Chai, Jeng-Da, Abdullah, Nzar Rauf, Tang, Chi-Shung, Moldoveanu, Valeriu, Manolescu, Andrei
Publikováno v:
Physical Review B 110, 205301 (2024)
We employ a ``real-time'' excitation scheme to calculate the excitation spectra of a two-dimensional electron system in a square array of quantum dots placed in a circular cylindrical far-infrared photon cavity subjected to a perpendicular homogeneou
Externí odkaz:
http://arxiv.org/abs/2409.09936
Autor:
Gudmundsson, Vidar, Mughnetsyan, Vram, Goan, Hsi-Sheng, Chai, Jeng-Da, Abdullah, Nzar Rauf, Tang, Chi-Shung, Moldoveanu, Valeriu, Manolescu, Andrei
Publikováno v:
Phys. Rev. B 109, 235306 (2024)
We model the equilibrium properties of a two-dimensional electron gas in a square lateral superlattice of quantum dots in a GaAs heterostructure subject to an external homogeneous perpendicular magnetic field and a far-infrared circular cylindrical p
Externí odkaz:
http://arxiv.org/abs/2403.10027
Autor:
Mansoury, Maryam, Mughnetsyan, Vram, Manaselyan, Aram, Kirakosyan, Albert, Gudmundsson, Vidar, Aziz-Aghchegala, Vigen
In this paper a comparative study of the electronic and magnetic properties of quasi-two-dimensional electrons in an artificial graphene-like superlattice composed of circular and elliptical quantum dots is presented. A complete orthonormal set of ba
Externí odkaz:
http://arxiv.org/abs/2307.02622
Autor:
Mughnetsyan, Vram, Gudmundsson, Vidar, Abdullah, Nzar Rauf, Tang, Chi-Shung, Moldoveanu, Valeriu, Manolescu, Andrei
We apply quantum electrodynamical density functional theory to obtain the electronic density, the spin polarization, as well as the orbital and the spin magnetization of square periodic arrays of quantum dots or antidots subjected to the influence of
Externí odkaz:
http://arxiv.org/abs/2306.06765
Autor:
Gudmundsson, Vidar, Mughnetsyan, Vram, Abdullah, Nzar Rauf, Tang, Chi-Shung, Moldoveanu, Valeriu, Manolescu, Andrei
Publikováno v:
Phys. Rev. B 108, 115306 (2023)
We use a recently proposed quantum electrodynamical density functional theory (QEDFT) functional in a real-time excitation calculation for a two-dimensional electron gas in a square array of quantum dots in an external constant perpendicular magnetic
Externí odkaz:
http://arxiv.org/abs/2305.11544
The effects of a far-infrared photon cavity field on the magnetization of a square quantum dot array
Autor:
Gudmundsson, Vidar, Mughnetsyan, Vram, Abdullah, Nzar Rauf, Tang, Chi-Shung, Moldoveanu, Valeriu, Manolescu, Andrei
Publikováno v:
Phys. Rev. B 106, 115308 (2022)
The orbital and spin magnetization of a cavity-embedded quantum dot array defined in a GaAs heterostructure are calculated within quantum-electrodynamical density-functional theory (QEDFT). To this end a gradient-based exchange-correlation functional
Externí odkaz:
http://arxiv.org/abs/2203.11029
Autor:
Gudmundsson, Vidar, Mughnetsyan, Vram, Abdullah, Nzar Rauf, Tang, Chi-Shung, Moldoveanu, Valeriu, Manolescu, Andrei
Publikováno v:
Phys. Rev. B 105, 155302 (2022)
We present theoretical calculations for the cyclotron resonance and various magnetoplasmon modes of a Coulomb interacting two-dimensional GaAs electron gas (2DEG) modulated as a lateral superlattice of quantum dots subjected to an external perpendicu
Externí odkaz:
http://arxiv.org/abs/2112.08216
The miniband Aharonov-Bohm oscillations and the interminiband absorption coefficient have been considered theoretically for one-layer superlattices of square and rectangular symmetries, composed of cylindrical quantum rings in the external transverse
Externí odkaz:
http://arxiv.org/abs/1909.08938