Publications by Pascal Gehring

Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite

Klaus Kern, Marko Burghard, Pascal Gehring, Alexander Ronald Hoyer, Kristina Vaklinova

Three-dimensional topological insulators comprise topologically protected surface states displaying massless, Dirac-like linear dispersion with spin-momentum locking. Electrical conduction through such surface states has been documented to manifest itself ...

Nature Publishing Group2015

Thin-layer black phosphorous/GaAs heterojunction p-n diodes

Klaus Kern, Marko Burghard, Pascal Gehring

Owing to its high carrier mobility and thickness-tunable direct band gap, black phosphorous emerges as a promising component of optoelectronic devices. Here, we evaluate the device characteristics of p-n heterojunction diodes wherein thin black phosphorous ...

Amer Inst Physics2015

Thin-layer black phosphorus/GaAs heterojunction p-n diodes (vol 106, 233110, 2015)

Klaus Kern, Marko Burghard, Pascal Gehring

Amer Inst Physics2015

Tetradymites as Natural Hyperbolic Materials for the Near-Infrared to Visible

Klaus Kern, Moritz Esslinger, Pascal Gehring

Hyperbolic media exhibit unparalleld properties, e.g, as light absorbers in photovoltaics and photonics, as superlenses in far-field imaging, as subwavelength light concentrators in nanolithography, or as novel materials in emission engineering. With the a ...

Amer Chemical Soc2014

Magnetotransport properties of Topological Insulator thin films

Pascal Gehring

EPFL2014

Gate-controlled linear magnetoresistance in thin Bi2Se3 sheets

Klaus Kern, Marko Burghard, Pascal Gehring

We explore the emergence of linear magnetoresistance in thin Bi2Se3 sheets upon tuning the carrier density using a back gate. With increasingly negative gate voltage, a pronounced magnetoresistance of similar to 100% is observed, while the associated B-fie ...

AIP American Institute of Physics2012

Growth of High-Mobility Bi2Te2Se Nanoplatelets on hBN Sheets by van der Waals Epitaxy

Klaus Kern, Marko Burghard, Pascal Gehring

The electrical detection of the surface states of topological insulators is strongly impeded by the interference of bulk conduction, which commonly arises due to pronounced doping associated with the formation of lattice defects. As exemplified by the topo ...

Amer Chemical Soc2012

Two-dimensional magnetotransport in Bi2Te2Se nanoplatelets

Klaus Kern, Marko Burghard, Pascal Gehring

Single-crystalline Bi2Te2Se nanoplates with thicknesses between 8 and 30 nm and lateral sizes of several micrometers were synthesized by a vapour-solid growth method. Angle-dependent magnetoconductance measurements on individual nanoplates revealed the pre ...

AIP American Institute of Physics2012