Zobrazeno 1 - 10
of 59
pro vyhledávání: '"ZEBROWSKI D"'
Publikováno v:
Phys. Rev. B 99, 195406 (2019)
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 the boundary condition for the spinor wave function components at the
Externí odkaz:
http://arxiv.org/abs/1901.07195
Autor:
Szafran, B., Zebrowski, D.
Publikováno v:
Phys. Rev. B 98, 155305 (2018)
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 effects of the intervalley scattering induced by the crystal edge and t
Externí odkaz:
http://arxiv.org/abs/1806.10012
Publikováno v:
Scientific Reports 8, 7166 (2018)
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 energy gap in the outside of the quantum dot traps the carriers withi
Externí odkaz:
http://arxiv.org/abs/1805.02930
Publikováno v:
Phys. Rev. B 97, 155412 (2018)
The aim of presented research is to design a nanodevice, based on a MoS$_2$ monolayer, performing operations on a well-defined valley qubit. We show how to confine an electron in a gate induced quantum dot within the monolayer, and to perform the NOT
Externí odkaz:
http://arxiv.org/abs/1801.09957
Publikováno v:
Phys. Rev. B 96, 035434 (2017)
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 that the extended electron wave functions have opposite parities on ea
Externí odkaz:
http://arxiv.org/abs/1703.06099
Spin transitions driven by a periodically varying electric potential in dilute fluorinated graphene quantum dots are investigated. Flakes of monolayer graphene are considered as well as electrostatic electron traps induced in bilayer graphene. The st
Externí odkaz:
http://arxiv.org/abs/1612.07001
Autor:
Żebrowski, D. P., Szafran, B.
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 approach with the electron-electron interaction introduced by a mean field l
Externí odkaz:
http://arxiv.org/abs/1508.06809
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 exact diagonalization method to study the reaction of the electron system
Externí odkaz:
http://arxiv.org/abs/1406.6806
Publikováno v:
Phys. Rev. B 88, 165405(2013)
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 zigzag edges the dot-localized energy levels appear within the energy
Externí odkaz:
http://arxiv.org/abs/1310.4808
Publikováno v:
J. Phys.: Condens. Matter 25 (2013) 335801
We perform a numerical simulation of mapping of charge confined in quantum dots by the scanning probe technique. We solve the few-electron Schr\"odinger equation with the exact diagonalization approach and evaluate the energy maps in function of the
Externí odkaz:
http://arxiv.org/abs/1307.1206