51 citations · 105 across the 4 of their papers we have counts for
8 papers
Engineering tunable strain fields in suspended graphene by microelectromechanical systems
Jens Sonntag, Matthias Goldsche, Tymofiy Khodkov +5
Here, we present a micro-electromechanical system (MEMS) for the investigation of the electromechanical coupling in graphene and potentially related 2D materials. Key innovations o…
Electrical Control over Phonon Polarization in Strained Graphene
Jens Sonntag, Sven Reichardt, Bernd Beschoten +1
We explore the tunability of the phonon polarization in suspended uniaxially strained graphene by magneto-phonon resonances. The uniaxial strain lifts the degeneracy of the LO and…
First-principles calculations of charge carrier mobility and conductivity in bulk semiconductors and two-dimensional materials
Samuel Poncé, Wenbin Li, Sven Reichardt +1
One of the fundamental properties of semiconductors is their ability to support highly tunable electric currents in the presence of electric fields or carrier concentration gradien…
Non-adiabatic exciton-phonon coupling in Raman spectroscopy of layered materials
Sven Reichardt, Ludger Wirtz
We present an ab initio computational approach for the calculation of resonant Raman intensities, including both excitonic and non-adiabatic effects. Our diagrammatic approach, whi…
Theory of resonant Raman scattering: Toward a comprehensive \textit{ab initio} description
Sven Reichardt, Ludger Wirtz
We develop a general, fully quantum mechanical theory of Raman scattering from first principles in terms of many-body correlation functions. In order to arrive at expressions that…
Impact of thermal annealing on graphene devices encapsulated in hexagonal boron nitride
S. Engels, B. Terrés, F. Klein +6
We present a thermal annealing study on single-layer and bilayer (BLG) graphene encapsulated in hexagonal boron nitride. The samples are characterized by electron transport and Ram…