48 citations · 187 across the 14 of their papers we have counts for
6 papers · 1 filter
Transport and quantum coherence in graphene rings: Aharonov-Bohm oscillations, Klein tunneling and particle localization
Alexander Filusch, Christian Wurl, Andreas Pieper +1
Simulating quantum transport through mesoscopic, ring-shaped graphene structures, we address various quantum coherence and interference phenomena. First, a perpendicular magnetic f…
Topological insulators in random potentials
Andreas Pieper, Holger Fehske
We investigate the effects of magnetic and nonmagnetic impurities on the two-dimensional surface states of three-dimensional topological insulators (TIs). Modeling weak and strong…
Electron confinement in graphene with gate-defined quantum dots
Holger Fehske, Georg Hager, Andreas Pieper
We theoretically analyse the possibility to electrostatically confine electrons in circular quantum dot arrays, impressed on contacted graphene nanoribbons by top gates. Utilising…
Dot-bound and dispersive states in graphene quantum dot superlattices
A. Pieper, R. L. Heinisch, G. Wellein +1
We consider a square lattice configuration of circular gate-defined quantum dots in an unbiased graphene sheet and calculate the electronic, particularly spectral properties of fin…
Electron dynamics in graphene with gate-defined quantum dots
A. Pieper, R. L. Heinisch, H. Fehske
We use numerically exact Chebyshev expansion and kernel polynomial methods to study transport through circular graphene quantum dots in the framework of a tight-binding honeycomb l…
Effects of disorder and contacts on transport through graphene nanoribbons
A. Pieper, G. Schubert, G. Wellein +1
We study the transport of charge carriers through finite graphene structures. The use of numerical exact kernel polynomial and Green function techniques allows us to treat actual s…