857 citations · 3.3k across the 32 of their papers we have counts for
21 papers · 1 filter
Electrochemical etching strategy for shaping monolithic 3D structures from 4H-SiC wafers
André Hochreiter, Fabian Groß, Morris-Niklas Möller +2
Silicon Carbide (SiC) is an outstanding material, not only for electronic applications, but also for projected functionalities in the realm of photonic quantum technologies, nano-m…
Electronic coherence and coherent dephasing in the optical control of electrons in graphene
Christian Heide, Timo Eckstein, Tobias Boolakee +4
Electronic coherence is of utmost importance for the access and control of quantum-mechanical solid-state properties. Using a purely electronic observable, the photocurrent, we mea…
Thermal origin of light emission in non-resonant and resonant tunnel junctions
Christian Ott, Stephan Götzinger, Heiko B. Weber
Electron tunneling is associated with light emission. In order to elucidate its generating mechanism, we provide a novel experimental ansatz that employs fixed-distance epitaxial g…
Thermoelectricity of near-resonant tunnel junctions and their near-Carnot efficiency
Matthias A. Popp, André Erpenbeck, Heiko B. Weber
The resonant tunneling model is the simplest model for describing electronic transport through nanoscale objects like individual molecules. A complete understanding includes not on…
Coherent electron trajectory control in graphene
Christian Heide, Takuya Higuchi, Heiko B. Weber +1
We investigate coherent electron dynamics in graphene, interacting with the electric field waveform of two orthogonally polarized, few-cycle laser pulses. Recently, we demonstrated…
Fractional Quantum Hall plateaus in mosaic-like conductors
Ferdinand Kisslinger, Dennis Rienmüller, Christian Ott +2
We report a simple route to generate magnetotransport data that results in fractional quantum Hall plateaus in the conductance. Ingredients to the generating model are conducting t…
Charge Transport in C-based Single-Molecule Junctions with Graphene Electrodes
Susanne Leitherer, Pedro B. Coto, Konrad Ullmann +2
We investigate charge transport in C-based single-molecule junctions with graphene electrodes employing a combination of density functional theory (DFT) electronic structure…
Current Noise in Single-Molecule Junctions Induced by Electronic-Vibrational Coupling
C. Schinabeck, R. Härtle, H. B. Weber +1
The influence of multiple vibrational modes on current fluctuations in electron transport through single-molecule junctions is investigated. Our analysis is based on a generic mode…
The detection of Kondo effect in the resistivity of graphene: artifacts and strategies
Johannes Jobst, Ferdinand Kisslinger, Heiko B. Weber
We discuss the difficulties to discover Kondo effect in the resistivity of graphene. Similarly to the Kondo effect, electron-electron interaction effects and weak localization appe…
Experimental Evidence for Quantum Interference and Vibrationally Induced Decoherence in Single-Molecule Junctions
Stefan Ballmann, Rainer Härtle, Pedro B. Coto +5
We analyze quantum interference and decoherence effects in single-molecule junctions both experimentally and theoretically by means of the mechanically controlled break junction te…
Manifestation of electron-electron interaction in the magnetoresistance of graphene
Johannes Jobst, Daniel Waldmann, Igor V. Gornyi +2
We investigate the magnetotransport in large area graphene Hall bars epitaxially grown on silicon carbide. In the intermediate field regime between weak localization and Landau qua…
Resonant vibrations, peak broadening and noise in single molecule contacts: beyond the resonant tunnelling picture
Daniel Secker, Stefan Wagner, Stefan Ballmann +3
We carry out experiments on single-molecule junctions at low temperatures, using the mechanically controlled break junction technique. Analyzing the results received with more than…
How Graphene-like is Epitaxial Graphene? \\Quantum Oscillations and Quantum Hall Effect
Johannes Jobst, Daniel Waldmann, Florian Speck +4
We investigate the transport properties of high-quality single-layer graphene, epitaxially grown on a 6H-SiC(0001) substrate. We have measured transport properties, in particular c…
Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
D. Beckmann, H. B. Weber, H. v. Löhneysen
We have measured the non-local resistance of aluminum-iron spin-valve structures fabricated by e-beam lithography and shadow evaporation. The sample geometry consists of an aluminu…
Dimensionality effects on non-equilibrium electronic transport in Cu nanobridges
D. Beckmann, H. B. Weber, H. v. Löhneysen
We report on non-equilibrium electronic transport through normal-metal (Cu) nanobridges coupled to large reservoirs at low temperatures. We observe a logarithmic temperature depend…
Low-temperature Conductance Measurements On Single Molecules
J. Reichert, H. B. Weber, M. Mayor +1
An experimental protocol which allows to perform conductance spectroscopy on organic molecules at low temperatures (T~30 K) has been developed. This extends the method of mechanica…
Contacting single bundles of carbon nanotubes with alternating electric fields
R. Krupke, F. Hennrich, H. B. Weber +5
Single bundles of carbon nanotubes have been selectively deposited from suspensions onto sub-micron electrodes with alternating electric fields. We explore the resulting contacts u…
Driving current through single organic molecules
J. Reichert, R. Ochs, D. Beckmann +3
We investigate electronic transport through two types of conjugated molecules. Mechanically controlled break-junctions are used to couple thiol endgroups of single molecules to two…
Zero-bias transport anomaly in metallic nanobridges: Magnetic field dependence and universal conductance fluctuations
H. B. Weber, R. Häussler, H. v. Löhneysen +1
We present data of transport measurements through a metallic nanobridge exhibiting diffusive electron transport. A logarithmic temperature dependence and a zero-bias anomaly in the…
Non-equilibrium electronic transport and interaction in short metallic nanobridges
H. B. Weber, R. Häussler, H. v. Löhneysen +1
We have observed interaction effects in the differential conductance of short, disordered metal bridges in a well-controlled non-equilibrium situation, where the distribution f…
Conductance oscillations in mesoscopic rings: microscopic versus macroscopic picture
R. Haeussler, E. Scheer, H. B. Weber +1
The phase of Aharonov-Bohm oscillations in mesoscopic metal rings in the presence of a magnetic field can be modulated by application of a DC-bias current I_DC. We address the ques…