56 citations · 146 across the 12 of their papers we have counts for
12 papers
Finite difference method for Dirac electrons in circular quantum dots
B. Szafran, A. Mrenca-Kolasinska, D. Zebrowski
A simple and reliable finite difference approach is presented for solution of the Dirac equation eigenproblem for states confined in rotationally symmetric systems. The method sets…
Spin and valley manipulation in single and double electrostatic silicene quantum dots
B. Szafran, D. Zebrowski
We study single and double quantum dots defined electrostatically within silicene. The spin-valley structure of the confined single- and two-electron system is determined and the e…
Electrostatic quantum dots in silicene
B. Szafran, D. Zebrowski, A. Mrenca-Kolasinska
We study electrostatic quantum dot confinement for charge carriers in silicene. The confinement is formed by vertical electric field surrounding the quantum dot area. The resulting…
Electrical control of a confined electron spin in a silicene quantum dot
Bartlomiej Szafran, Alina Mrenca-Kolasinska, Bartlomiej Rzeszotarski +1
We study spin control for an electron confined in a flake of silicene. We find that the lowest-energy conduction-band levels are split by the diagonal intrinsic spin-orbit coupling…
Aharonov-Bohm conductance oscillations and current equilibration in local n - p junctions in graphene
Dariusz Żebrowski, Alina Mrenca-Kolasinska, Bartłomiej Szafran
We consider a small p-type island defined within n-type graphene nanoribbon induced by potential of a floating electrode. In the quantum Hall conditions the island supports persist…
Valley qubit in gated MoS monolayer quantum dot
J. Pawłowski, D. Żebrowski, S. Bednarek
The aim of presented research is to design a nanodevice, based on a MoS monolayer, performing operations on a well-defined valley qubit. We show how to confine an electron in a…
Double quantum dots defined in bilayer graphene
D. P. Żebrowski, F. M. Peeters, B. Szafran
Artificial molecular states of double quantum dots defined in bilayer graphene are studied with the atomistic tight-binding and its low-energy continuum approximation. We indicate…
Spin transitions driven by electric dipole spin resonance in fluorinated single- and bilayer-graphene quantum dots
D. P. Żebrowski, F. M. Peeters, B. Szafran
Spin transitions driven by a periodically varying electric potential in dilute fluorinated graphene quantum dots are investigated. Flakes of monolayer graphene are considered as we…
Charging graphene nanoribbon quantum dots
D. P. Żebrowski, B. Szafran
We describe charging a quantum dot induced electrostatically within a semiconducting graphene nanoribbon by electrons or holes. The applied model is based on a tight-binding approa…
Imaging transition to fractional quantum Hall regime by Coulomb blockade microscopy
E. Wach, D. P. Żebrowski, B. Szafran
We consider electron systems in quantum dots and imaging of the confined charge density by the Coulomb blockade microscopy (CBM) with the scanning probe technique. We apply an exac…
Confined states in quantum dots defined within finite flakes of bilayer graphene: Coupling to the edge, ionization threshold, and valley degeneracy
D. P. Żebrowski, E. Wach, B. Szafran
We study quantum dots defined by external potentials within finite flakes of bilayer graphene using the tight-binding approach. We find that in the limit of large flakes containing…
Charge density mapping of strongly-correlated few-electron two-dimensional quantum dots by scanning probe technique
E. Wach, D. P. Zebrowski, B. Szafran
We perform a numerical simulation of mapping of charge confined in quantum dots by the scanning probe technique. We solve the few-electron Schrödinger equation with the exact diago…