243 citations · 567 across the 11 of their papers we have counts for
11 papers
Spin exchange interaction with tunable range between graphene quantum dots
Matthias Braun, P. R. Struck, Guido Burkard
We study the spin exchange between two electrons localized in separate quantum dots in graphene. The electronic states in the conduction band are coupled indirectly by tunneling to…
Non-adiabatic two-parameter charge and spin pumping in a quantum dot
Matthias Braun, Guido Burkard
We study DC charge and spin transport through a weakly coupled quantum dot, driven by a non-adiabatic periodic change of system parameters. We generalize the model of Tien and Gord…
Signature of chirality in scanning-probe imaging of charge flow in graphene
Matthias Braun, Luca Chirolli, Guido Burkard
We theoretically propose to directly observe the chiral nature of charge carriers in graphene mono- and bilayers within a controlled scattering experiment. The charge located on a…
Theory of a Magnetically-Controlled Quantum-Dot Spin Transistor
Daniel Urban, Matthias Braun, Jürgen König
We examine transport through a quantum dot coupled to three ferromagnetic leads in the regime of weak tunnel coupling. A finite source-drain voltage generates a nonequilibrium spin…
Frequency-Dependent Current Noise through Quantum-Dot Spin Valves
Matthias Braun, Jürgen König, Jan Martinek
We study frequency-dependent current noise through a single-level quantum dot connected to ferromagnetic leads with non-collinear magnetization. We propose to use the frequency-dep…
Faraday-rotation fluctuation spectroscopy with static and oscillating magnetic fields
Matthias Braun, Jürgen König
By Faraday-rotation fluctuation spectroscopy one measures the spin noise via Faraday-induced fluctuations of the polarization plane of a laser transmitting the sample. In the fist…