188 citations · 1k across the 23 of their papers we have counts for
4 papers · 1 filter
Versatile sputtering technology for Al2O3 gate insulators on graphene
M. Friedemann, M. Woszczyna, A. Müller +5
We report a novel fabrication method of graphene Al2O3 gate insulators based on sputtering. Electrical performance of dual-gated mono- and bilayer exfoliated graphene devices is pr…
Electron Counting Capacitance Standard with an improved five-junction R-pump
Benedetta Camarota, Hansjoerg Scherer, Mark W Keller +3
The Electron Counting Capacitance Standard currently pursued at PTB aims to close the Quantum Metrological Triangle with a final precision of a few parts in 10^7. This paper report…
Graphene p-n junction Arrays as Quantum-Hall Resistance Standards
Mirosław Woszczyna, Miriam Friedemann, Thorsten Dziomba +2
We demonstrate a device concept to fabricate resistance standards made of quantum Hall series arrays by using p-type and n-type graphene. The ambipolar nature of graphene allows fa…
Magneto-Transport Properties of Exfoliated Graphene on GaAs
Mirosław Woszczyna, Miriam Friedemann, Klaus Pierz +2
We studied the magneto-transport properties of graphene prepared by exfoliation on a III V semiconductor substrate. Tuneability of the carrier density of graphene was achieved by u…