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Plasmonic excitations in Coulomb coupled N-layer graphene structures
J. -J. Zhu, S. M. Badalyan, F. M. Peeters
We study Dirac plasmons and their damping in spatially separated -layer graphene structures at finite doping and temperatures. The plasmon spectrum consists of one optical excit…
Piezoelectric surface acoustical phonon limited mobility of electrons in graphene on a GaAs substrate
S. H. Zhang, W. Xu, S. M. Badalyan +1
We study the mobility of Dirac fermions in monolayer graphene on a GaAs substrate, restricted by the combined action of the extrinsic potential of piezoelectric surface acoustical…
Wavepacket scattering on graphene edges in the presence of a (pseudo) magnetic field
D. R. da Costa, A. Chaves, G. A. Farias +2
The scattering of a Gaussian wavepacket in armchair and zigzag graphene edges is theoretically investigated by numerically solving the time dependent Schrödinger equation for the t…
Superconducting transition temperature of Pb nanofilms: Impact of the thickness-dependent oscillations of the phonon mediated electron-electron coupling
Yajiang Chen, A. A. shanenko, F. M. Peeters
To date, several experimental groups reported measurements of the thickness dependence of T_c of atomically uniform single-crystalline Pb nanofilms. The reported amplitude of the T…
Two-band superconductors: Extended Ginzburg-Landau formalism by a systematic expansion in small deviation from the critical temperature
A. V. Vagov, A. A. Shanenko, M. V. Milošević +2
We derive the extended Ginzburg-Landau (GL) formalism for a clean s-wave two-band superconductor by employing a systematic expansion of the free-energy functional and the correspon…
Ginzburg-Landau theory of the zig-zag transition in quasi-one-dimensional classical Wigner crystals
J. E. Galván-Moya, F. M. Peeters
We present a mean-field description of the zig-zag phase transition of a quasi-one-dimensional system of strongly interacting particles, with interaction potential …
Structural transitions in vertically and horizontally coupled parabolic channels of Wigner crystals
J. E. Galván-Moya, K. Nelissen, F. M. Peeters
Structural phase transitions in two vertically or horizontally coupled channels of strongly interacting particles are investigated. The particles are free to move in the -direct…
Spatially-dependent sensitivity of superconducting meanders as single-photon detectors
G. R. Berdiyorov, M. V. Milošević, F. M. Peeters
The photo-response of a thin current-carrying superconducting stripe with a 90-degree turn is studied within the time-dependent Ginzburg-Landau theory. We show that the photon acti…
Large Magnetoresistance Oscillations in Mesoscopic Superconductors Due to Current-Excited Moving Vortices
G. R. Berdiyorov, M. V. Milošević, M. L. Latimer +3
We show in the case of a superconducting Nb ladder that a mesoscopic superconductor typically exhibits magnetoresistance oscillations whose amplitude and temperature dependence are…
Strain engineered graphene using a nanostructured substrate: I Deformations
M. Neek-Amal, F. M. Peeters
Using atomistic simulations we investigate the morphological properties of graphene deposited on top of a nanostructured substrate. Sinusoidally corrugated surfaces, steps, elongat…
Strain engineered graphene using a nanostructured substrate: II Pseudo-magnetic fields
M. Neek-Amal, F. M. Peeters
The strain induced pseudo-magnetic field in supported graphene deposited on top of a nanostructured substrate is investigated by using atomistic simulations. Step, elongated trench…
Tunable optical Aharonov-Bohm effect in a semiconductor quantum ring
Bin Li, F. M. Peeters
By applying an electric field perpendicular to a semiconductor quantum ring we show that it is possible to modify the single particle wave function between quantum dot (QD)-like to…
Controllable spin singlet - spin triplet transition in three concentric quantum rings through magnetic field and confinement potential
Bin Li, F. M. Peeters
We present a theoretical study of the spectrum of electrons confined in triple concentric rings. An unusual ordering and rich variety of angular momentum transitions are found that…
Resonant harmonic generation and collective spin rotations in electrically driven quantum dots
M. P. Nowak, B. Szafran, F. M. Peeters
Spin rotations induced by an AC electric field in a two-electron double quantum dot are studied by an exact numerical solution of the time dependent Schroedinger equation in the co…
Two-band superconductors: Hidden criticality deep in the superconducting state
L. Komendová, Yajiang Chen, A. A. Shanenko +2
We show that two-band superconductors harbor hidden criticality deep in the superconducting state, stemming from the critical temperature of the weaker band taken as an independent…
Effect of grain boundary on the buckling of graphene nanoribbons
M. Neek-Amal, F. M. Peeters
The buckling of graphene nano-ribbons containing a grain boundary is studied using atomistic simulations where free and supported boundary conditions are invoked. We found that whe…
Atypical BCS-BEC crossover induced by quantum-size effects
A. A. Shanenko, M. D. Croitoru, A. V. Vagov +3
Quantum-size oscillations of the basic physical characteristics of a confined fermionic condensate are a well-known phenomenon. Its conventional understanding is based on the singl…
Spin Orbit Mediated Manipulation of Heavy Hole Spin Qubit in Gated Semiconductor Nanodevices
P. Szumniak, S. Bednarek, B. Partoens +1
A novel spintronic nanodevice is proposed that is capable to manipulate the single heavy hole spin state in a coherent manner. It can act as a single quantum logic gate. The heavy…