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Quantenphysik in zweilagigem Graphen (Lüdtke, Haug/FKP)

Electronic transport is a powerful and versatile tool to explore quantum effects in nanostructures. 

In our institute, the electronic properties of the low-dimensional electron gas systems are comprehensively studied as a function of temperature (down to 10mK), frequency (up to Ghz), magnetic fields (up to 20T), time (ns-resolution) and probe spacings (down to 50 nm). 

Among other systems, the transport in GaAs heterostructures, graphene, topological insulators as well as metallic adlayers and single molecules are currently investigated.

Please find here some recent examples: 

Competition between Kondo Screening and Quantum Hall Edge Reconstruction

Phys. Rev. Lett. 116, 096802 (2016)

Picture: Sketch of the edge channel structure near the QD for noninteger filling factors immediately above ν > 4 (top) and below ν < 4 (bottom), respectively.

Exceptional ballistic transport in epitaxial graphene nanoribbons 

Nature, 506, 349 (2014)

Picture: AFM image of an array of graphene ribbons on sidewalls of 20-nm-deep trenches. Top inset, up to four individual probes are brought into contact with a selected graphene ribbon, and serve as current leads (I1, I2) and voltage probes (V1, V2).

Conductance through single biphenyl molecules: symmetric and asymmetric coupling to electrodes

Beilstein J. Nanotechnol. 6, 1690–1697, (2015)

Picture: Schematic of our break junction setup