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Quantum Hall transport as a probe of capacitance profile at graphene edges
I. J. Vera-Marun, P. J. Zomer, A. Veligura +6
The quantum Hall effect is a remarkable manifestation of quantized transport in a two-dimensional electron gas. Given its technological relevance, it is important to understand its…
Field induced quantum-Hall ferromagnetism in suspended bilayer graphene
H. J. van Elferen, A. Veligura, E. V. Kurganova +5
We have measured the magneto-resistance of freely suspended high-mobility bilayer graphene. For magnetic fields T we observe the opening of a field induced gap at the charge…
A new transfer technique for high mobility graphene devices on commercially available hexagonal boron nitride
P. J. Zomer, S. P. Dash, N. Tombros +1
We present electronic transport measurements of single- and bilayer graphene on commercially available hexagonal boron nitride. We extract mobilities as high as 125 000 cm^2/V/s at…
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…
Quantized conductance of a suspended graphene nanoconstriction
Nikolaos Tombros, Alina Veligura, Juliane Junesch +4
A yet unexplored area in graphene electronics is the field of quantum ballistic transport through graphene nanostructures. Recent developments in the preparation of high mobility g…