341 citations · 1.3k across the 32 of their papers we have counts for
14 papers · 1 filter
Gate-tunable regular and chaotic electron dynamics in ballistic bilayer graphene cavities
Lukas Seemann, Angelika Knothe, Martina Hentschel
The dispersion of any given material is crucial for its charge carriers' dynamics. For all-electronic, gate-defined cavities in gapped bilayer graphene, we developed a trajectory-t…
Quantum transport in graphene nanoribbon networks: complexity reduction by a network decimation algorithm
Tom Simon Rodemund, Fabian Teichert, Martina Hentschel +1
We study electronic quantum transport in graphene nanoribbon (GNR) networks on mesoscopic length scales. We focus on zigzag GNRs and investigate the conductance properties of stati…
Dirac fermion optics and directed emission from single- and bilayer graphene cavities
Jule-Katharina Schrepfer, Szu-Chao Chen, Ming-Hao Liu +2
High-mobility graphene hosting massless charge carriers with linear dispersion provides a promising platform for electron optics phenomena. Inspired by the physics of dielectric op…
Diffusion on edges of insulating graphene with intravalley and intervalley scattering
G. Tkachov, Martina Hentschel
Band gap engineering in graphene may open the routes towards transistor devices in which electric current can be switched off and on at will. One may, however, ask if a semiconduct…
Photoabsorption spectra and the X-ray edge problem in graphene
Georg Roeder, Grigory Tkachov, Martina Hentschel
We study the photoabsorption cross section and Fermi-edge singularities (FES) in graphene. For fillings below one half, we find, besides the expected FES in form of a peaked edge a…
Boundary-induced violation of the Dirac fermion parity and its signatures in local and global tunneling spectra of graphene
Grigory Tkachov, Martina Hentschel
Extended defects in graphene, such as linear edges, break the translational invariance and can also have an impact on the symmetries specific to massless Dirac-like quasiparticles…