61 citations · 946 across the 70 of their papers we have counts for
54 papers · 1 filter
Driven square lattice of quantum dots in a magnetic field coupled to a cylindrical FIR-photon cavity
Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan +6
We present a comprehensive computational study of driven quantum dot arrays in a square lattice configuration, subject to an external magnetic field and coupled to a cylindrical fa…
Signatures of broken symmetries in the excitations of a periodic 2DEG coupled to a cylindrical photon cavity
Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan +6
In a two-dimensional electron gas (2DEG) in a periodic lateral superlattice subjected to an external homogeneous magnetic field and in a cylindrical far-infrared photon cavity we s…
Spin-phase transition in an array of quantum rings controlled by cavity photons
Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan +5
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 electro…
The tuning of para- and diamagnetic cavity photon excitations in a square array of quantum dots in a magnetic field
Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan +5
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 cylindri…
Magneto-optical properties of a quantum dot array interacting with a far-infrared photon mode of a cylindrical cavity
Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan +5
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…
Magnetic properties of a cavity-embedded square lattice of quantum dots or antidots
Vram Mughnetsyan, Vidar Gudmundsson, Nzar Rauf Abdullah +3
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 per…
Controlling the excitation spectrum of a quantum dot array with a photon cavity
Vidar Gudmundsson, Vram Mughnetsyan, Nzar Rauf Abdullah +3
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 squar…
Single photon controlled steady state electron transport through a resonance DQD-Cavity system in a strong coupling regime
Halo Anwar Abdulkhalaq, Nzar Rauf Abdullah, Vidar Gudmundsson
We perform theoretical calculations to study steady-state electron transport in a double quantum dot, DQD, coupled to a quantized cavity photon field both in resonance and off-reso…
Photon and magnetic field controlled electron transport of a multiply-resonant photon-cavity double quantum dot system
Halo Anwar Abdulkhalaq, Nzar Rauf Abdullah, Vidar Gudmundsson
We study electron transport through double quantum dots (DQD) coupled to a cavity with a single photon mode. The DQD is connected to two electron reservoirs, and the total system i…
Thermal transport driven by Coulomb interactions in quantum dots: Enhancement of thermoelectric and heat currents
Bashdar Rahman Pirot, Nzar Rauf Abdullah, Ari Karim Ahmed
We investigate thermal transport in a serial asymmetric double quantum dot (DQD) coupled to two electron reservoirs with different temperatures. The inter- and intra-Coulomb intera…
Effects of coupling strength of the electron-photon and the photon-environment interactions on the electron transport through multiple-resonances of a double quantum dot system in a photon cavity
Halo Anwar Abdulkhalaq, Nzar Rauf Abdullah, Vidar Gudmundsson
We study electron transport properties through a double quantum dot (DQD) system coupled to a single mode photon cavity, DQD-cavity. The DQD system has a complex multilevel energy…
The effects of a far-infrared photon cavity field on the magnetization of a square quantum dot array
Vidar Gudmundsson, Vram Mughnetsyan, Nzar Rauf Abdullah +3
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…
Thermal transport controlled by intra- and inter-dot Coulomb interactions in sequential and cotunneling serially-coupled double quantum dots
Bashdar Rahman Pirot, Nzar Rauf Abdullah, Andrei Manolescu +1
We study thermoelectric transport through a serial double quantum dot (DQD) coupled to two metallic leads with different thermal energies. We take into account the electron sequent…
Controlling thermoelectric, heat, and energy currents through a quantum dot in sequential and cotunneling Coulomb-blockade regimes
Taha Yasin Ahmed, Nzar Rauf Abdullah, Vidar Gudmundsson
Thermal transport through a Coulomb-blockade quantum dot (QD) coupled to two metallic leads is studied using five different approaches to the master equation in which sequential an…
Unified approach to cyclotron and plasmon resonances in a periodic 2DEG hosting the Hofstadter butterfly
Vidar Gudmundsson, Vram Mughnetsyan, Nzar Rauf Abdullah +3
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 la…
Modulation of electronic and thermal proprieties of TaMoS by controlling the repulsive interaction between Ta dopant atoms
Nzar Rauf Abdullah, Botan Jawdat Abdullah, Hunar Omar Rashid +2
We theoretically study the electronic and the thermal characteristics of Tantalum, Ta, doped Molybdenum disulfide, MoS, using density functional theory. It has been shown that…
Interaction effects in a two-dimensional AlSiP nanosheet: A first-principles study on the electronic, mechanical, thermal, and optical properties
Nzar Rauf Abdullah, Hunar Omar Rashid, Andrei Manolescu +1
Physical quilities such as electronic, mechanical, thermal, and optical properties of Al and P codoped silicene forming AlSiP nanosheets are investigated by first-principle cal…
Properties of BCN monolayer derived by first-principle computation: Influences of interactions between dopant atoms
Nzar Rauf Abdullah, Botan Jawdat Abdullah, Chi-Shung Tang +1
The properties of graphene-like BCN semiconductor are studied using density functional theory taking into account the attractive interaction between B and N atoms. In the prese…
Study of BCN-bilayer graphene: Effects of atomic spacing and interatomic interaction between B and N atoms
Nzar Rauf Abdullah, Hunar Omar Rashid, Vidar Gudmundsson
We study the effects of an attractive interaction between the boron (B) and the nitrogen (N) atoms doped in a bilayer graphene (BLG), BCN, on the electronic, the thermal and…
Role of interlayer spacing on electronic, thermal and optical properties of BN-codoped bilayer graphene:\break Influence of the interlayer and the induced dipole-dipole interactions
Nzar Rauf Abdullah, Hunar Omar Rashid, Chi-Shung Tang +2
We demonstrate that the electronic, thermal, and optical properties of a graphene bilayer with boron and nitrogen dopant atoms can be controlled by the interlayer distance between…
Conversion of the stacking orientation of bilayer graphene due to \break the interaction of BN-dopants
Nzar Rauf Abdullah, Hunar Omar Rashid, Chi-Shung Tang +2
A conversion of AA- to AB-stacking bilayer graphene (BLG) due to interlayer interaction is demonstrated. Two types of interlayer interactions, an attractive and a repulsive, betwee…
Spin-polarised DFT modeling of electronic, magnetic, thermal and optical properties of silicene doped with transition metals
Nzar Rauf Abdullah, Mohammad T. Kareem, Hunar Omar Rashid +2
The geometric, electronic, magnetic, thermal, and optical properties of transition metal (TM) doped silicene are systematically explored using spin-dependent density functional com…
Interlayer interaction controlling the properties of AB- and AA-stacked bilayer graphene-like BCN and SiC
Nzar Rauf Abdullah, Hunar Omar Rashid, Andrei Manolescu +1
We model bilayer graphene-like materials with SiC and BCN stoichiometry, where the interlayer interactions play important roles shaping the physical properties of…
Self-induction and magnetic effects in electron transport through a photon cavity
Vidar Gudmundsson, Nzar Rauf Abdullah, Chi-Shung Tang +2
We explore higher order dynamical effects in the transport through a two-dimensional nanoscale electron system embedded in a three-dimensional far-infrared photon cavity. The nanos…