Wave-packet dynamics and valley filter in strained graphene

A Chaves, L Covaci, KY Rakhimov, GA Farias… - Physical Review B …, 2010 - APS
The time evolution of a wave packet in strained graphene is studied within the tight-binding
model and continuum model. The effect of an external magnetic field, as well as a strain …

Time-dependent Landauer-Büttiker formula: Application to transient dynamics in graphene nanoribbons

R Tuovinen, E Perfetto, G Stefanucci, R Van Leeuwen - Physical Review B, 2014 - APS
In this work, we develop a time-dependent extension of the Landauer-Büttiker approach to
study transient dynamics in time-dependent quantum transport through molecular junctions …

Spin and charge persistent currents in a Kane Mele α-T 3 quantum ring

M Islam, S Basu - Journal of Physics: Condensed Matter, 2023 - iopscience.iop.org
We conduct a thorough study of different persistent currents in a spin-orbit coupled α-T 3
(pseudospin-1) fermionic quantum ring (QR) that smoothly interpolates between graphene …

Wavepacket scattering of Dirac and Schrödinger particles on potential and magnetic barriers

KY Rakhimov, A Chaves, GA Farias… - Journal of Physics …, 2011 - iopscience.iop.org
We investigate the dynamics of a charged particle moving in a graphene layer and in a two-
dimensional electron gas, where it obeys the Dirac and the Schrödinger equations …

Dirac fermions in graphene using the position-dependent translation operator formalism

V Aguiar, SM Cunha, DR da Costa, RNC Filho - Physical Review B, 2020 - APS
Within the position-dependent translation operator formalism for quantum systems, we
obtain analytical expressions for the eigenstates and the Landau level spectrum of Dirac …

Scanning gate microscopy simulations for quantum rings: Effective potential of the tip and conductance maps

B Szafran - Physical Review B—Condensed Matter and Materials …, 2011 - APS
We simulate electron flow through a semiconductor quantum ring perturbed by a charged tip
of a scanning microscope. We describe the interaction of the tip with the electron gas solving …

Wave-packet dynamics in multilayer phosphorene

SM Cunha, DR Da Costa, GO De Sousa, A Chaves… - Physical Review B, 2019 - APS
We investigate the dynamics of Gaussian wave packets in multilayer black phosphorus (BP).
Time-dependent average position and velocity are calculated analytically and numerically …

Electron collimation at van der Waals domain walls in bilayer graphene

HM Abdullah, DR Da Costa, H Bahlouli, A Chaves… - Physical Review B, 2019 - APS
We show that a domain wall separating single-layer graphene and AA-stacked bilayer
graphene (AA-BLG) can be used to generate highly collimated electron beams which can be …

The split-operator technique for the study of spinorial wavepacket dynamics

A Chaves, GA Farias, FM Peeters… - … in computational physics, 2015 - cambridge.org
The split-operator technique for wave packet propagation in quantum systems is expanded
here to the case of propagatingwave functions describing Schrödinger particles, namely …

Electronic and transport properties of anisotropic semiconductor quantum wires

SM Cunha, DR da Costa, LC Felix, A Chaves… - Physical Review B, 2020 - APS
Within the effective-mass approximation, we theoretically investigated the electronic and
transport properties of 2D semiconductor quantum wires (QWs) with anisotropic effective …