158 citations · 709 across the 11 of their papers we have counts for
11 papers
Proximity induced room-temperature ferromagnetism in graphene probed with spin currents
J. C. Leutenantsmeyer, A. A. Kaverzin, M. Wojtaszek +1
The introduction and control of ferromagnetism in graphene opens up a range of new directions for fundamental and applied studies. Several approaches have been pursued so far, such…
Temperature dependent transport characteristics of graphene/n-Si diodes
S. Parui, R. Ruiter, P. J. Zomer +3
Realizing an optimal Schottky interface of graphene on Si is challenging, as the electrical transport strongly depends on the graphene quality and the fabrication processes. Such i…
Absence of hyperfine effects in C-graphene spin valve devices
M. Wojtaszek, I. J. Vera-Marun, E. Whiteway +2
The carbon isotope C, in contrast to C, possesses a nuclear magnetic moment and can induce electron spin dephasing in graphene. This effect is usually neglected due t…
Transition between 1D and 0D spin transport studied by Hanle precession
M. Wojtaszek, I. J. Vera-Marun, B. J. van Wees
The precession of electron spins in a perpendicular magnetic field, the so called Hanle effect, provides an unique insight into spin properties of a non-magnetic material. In pract…
Electronic inhomogeneities in graphene: the role of the substrate interaction and chemical doping
A. Castellanos-Gomez, Arramel, M. Wojtaszek +5
We probe the local inhomogeneities of the electronic properties of graphene at the nanoscale using scanning probe microscopy techniques. First, we focus on the study of the electro…
Enhancement of spin relaxation time in hydrogenated graphene spin valve devices
M. Wojtaszek, I. J. Vera-Marun, T. Maassen +1
Hydrogen adsorbates in graphene are interesting as they are not only strong Coulomb scatterers but they also induce a change in orbital hybridization of the carbon network from sp^…
Reversible hydrogenation and band gap opening of graphene and graphite surfaces probed by scanning tunneling spectroscopy
Andres Castellanos-Gomez, Magdalena Wojtaszek, Arramel +2
The effect of hydrogenation on the topography and the electronic properties of graphene and graphite surfaces are studied by scanning tunneling microscopy and spectroscopy. The sur…
Atomically thin mica flakes and their application as ultrathin insulating substrates for graphene
Andres Castellanos-Gomez, Magdalena Wojtaszek, Nikolaos Tombros +3
We show that it is possible to deposit, by mechanical exfoliation on SiO2/Si wafers, atomically thin mica flakes down to a single monolayer thickness. The optical contrast of these…
A road to hydrogenating graphene by a reactive ion etching plasma
M. Wojtaszek, N. Tombros, A. Caretta +2
We report the hydrogenation of single and bilayer graphene by an argon-hydrogen plasma produced in a reactive ion etching (RIE) system. Electronic transport measurements in combina…
Large yield production of high mobility freely suspended graphene electronic devices on a PMGI based organic polymer
N. Tombros, A. Veligura, J. Junesch +6
The recent observation of fractional quantum Hall effect in high mobility suspended graphene devices introduced a new direction in graphene physics, the field of electron-electron…
Discovery of Gamma-ray Emission from M31 via FERMI-LAT
H. Ögelman, N. Aksaker, S. Anılan +3
2 years worth of archival FERMI-LAT data was used to search for the gamma-ray emission from the Andromeda galaxy. The data show no noticeable elliptical image. Subsequent on-off so…