Klos, J. W., Shylau, A. A., Zozoulenko, I. V., Xu, Hengyi, Heinzel, T.
We study the effects of the long-range disorder potential and warping on the conductivity and mobility of graphene ribbons using the Landauer formalism and the tight-binding p-orbital Hamiltonian. We...
Quantized magnetic confinement in quantum wires (2009)
Tarasov, A., Hugger, S., Xu, Hengyi, Cerchez, M., Heinzel, T., Zozoulenko, I. V., ...
Ballistic quantum wires are exposed to longitudinal profiles of perpendicular magnetic fields composed of a spike (magnetic barrier) and a homogeneous part. An asymmetric magnetoconductance peak as a...
Edge disorder and localization regimes in bilayer graphene nanoribbons (2009)
Xu, Hengyi, Heinzel, T., Zozoulenko, I. V.
A theoretical study of the magnetoelectronic properties of zigzag and armchair bilayer graphene nanoribbons (BGNs) is presented. Using the recursive Green's function method, we study the band...
Edge disorder induced Anderson localization and conduction gap in graphene nanoribbons (2008)
Evaldsson, M., Zozoulenko, I. V., Xu, Hengyi, Heinzel, T.
We study the effect of the edge disorder on the conductance of the graphene nanoribbons (GNRs). We find that only very modest edge disorder is sufficient to induce the conduction energy gap in the...
Magnetic barrier induced conductance fluctuations in quantum wires (2008)
Hugger, S., Xu, Hengyi, Tarasov, A., Cerchez, M., Heinzel, T., Zozoulenko, I. V., ...
Quasi-ballistic semiconductor quantum wires are exposed to localized perpendicular magnetic fields, also known as magnetic barriers. Pronounced, reproducible conductance fluctuations as a function of...
Magnetoresistance of antidot lattices with grain boundaries (2008)
Klinkhammer, S., Xu, Hengyi, Heinzel, T., Gennser, U., Faini, G., Ulysse, C., ...
The magnetotransport properties of antidot lattices containing artificially designed grain boundaries have been measured. We find that the grain boundaries broaden the commensurability resonances and...
Magnetic barriers in graphene nanoribbons (2008)
Xu, Hengyi, Heinzel, T., Evaldsson, M., Zozoulenko, I. V.
A theoretical study of the transport properties of zigzag and armchair graphene nanoribbons with a magnetic barrier on top is presented. The magnetic barrier modifies the energy spectrum of the...
Resonant reflection at magnetic barriers in quantum wires (2007)
Xu, Hengyi, Heinzel, T., Evaldsson, M., Ihnatsenka, S., Zozoulenko, I. V.
The conductance of a quantum wire containing a single magnetic barrier is studied numerically by means of the recursive Greens function technique. For sufficiently strong and localized barriers, Fano...