173 citations · 658 across the 9 of their papers we have counts for
9 papers
Spin Symmetry of the Bilayer Graphene Groundstate
Frank Freitag, Markus Weiss, Romain Maurand +2
We show nonlinear transport experiments on clean, suspended bilayer graphene that reveal a gap in the density of states. Looking at the evolution of the gap in magnetic fields of d…
Homogeneity of Bilayer Graphene
Frank Freitag, Markus Weiss, Romain Maurand +2
We present non-linear transport measurements on suspended, current annealed bilayer graphene devices. Using a multi-terminal geometry we demonstrate that devices tend to be inhomog…
Conductance fluctuations in graphene devices with superconducting contacts in different charge density regimes
F. Freitag, J. Trbovic, C. Schönenberger
Conductions fluctuations (CF) are studied in single layer graphene devices with superconducting source and drain contacts made from aluminium. The CF are found to be enhanced by su…
Spontaneously gapped ground state in suspended bilayer graphene
F. Freitag, J. Trbovic, M. Weiss +1
Bilayer graphene bears an eight-fold degeneracy due to spin, valley and layer symmetry, allowing for a wealth of broken symmetry states induced by magnetic or electric fields, by s…
Permalloy-based carbon nanotube spin-valve
H. Aurich, A. Baumgartner, F. Freitag +3
In this Letter we demonstrate that Permalloy (Py), a widely used Ni/Fe alloy, forms contacts to carbon nanotubes (CNTs) that meet the requirements for the injection and detection o…
From One Electron to One Hole: Quasiparticle Counting in Graphene Quantum Dots Determined by Electrochemical and Plasma Etching
S. Neubeck, L. A. Ponomarenko, F. Freitag +6
Graphene is considered to be a promising material for future electronics. The envisaged transistor applications often rely on precision cutting of graphene sheets with nanometer ac…