312 citations · 591 across the 6 of their papers we have counts for
7 papers
Conformal mapping and shot noise in graphene
Adam Rycerz, Patrik Recher, Michael Wimmer
Ballistic transport through a collection of quantum billiards in undoped graphene is studied analytically within the conformal mapping technique. The billiards show pseudodiffusive…
Tunneling anisotropic magnetoresistance in Fe/GaAs/Au junctions: orbital effects
M. Wimmer, M. Lobenhofer, J. Moser +6
We report experiments on epitaxially grown Fe/GaAs/Au tunnel junctions demonstrating that the tunneling anisotropic magnetoresistance (TAMR) effect can be controlled by a magnetic…
Symmetry Classes in Graphene Quantum Dots: Universal Spectral Statistics, Weak Localization, and Conductance Fluctuations
J. Wurm, A. Rycerz, I. Adagideli +3
We study the symmetry classes of graphene quantum dots, both open and closed, through the conductance and energy level statistics. For abrupt termination of the lattice, these prop…
Spin-polarized Quantum Transport in Mesoscopic Conductors: Computational Concepts and Physical Phenomena
Michael Wimmer, Matthias Scheid, Klaus Richter
Mesoscopic conductors are electronic systems of sizes in between nano- and micrometers, and often of reduced dimensionality. In the phase-coherent regime at low temperatures, the c…
Spin currents in rough graphene nanoribbons: Universal fluctuations and spin injection
M. Wimmer, I. Adagideli, S. Berber +2
We investigate spin conductance in zigzag graphene nanoribbons and propose a spin injection mechanism based only on graphitic nanostructures. We find that nanoribbons with atomical…
Zeeman ratchets for ballistic spin currents
Matthias Scheid, Michael Wimmer, Dario Bercioux +1
We investigate the possiblity of creating directed spin-polarized currents in a two-dimensional electron gas (2DEG) subject to an asymmetric magnetic field and an external adiabati…