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Spatially resolved Raman spectroscopy of single- and few-layer graphene.
We present Raman spectroscopy measurements on single- and few-layer graphene flakes. By using a scanning confocal approach, we collect spectral data with spatial resolution, which allows us to… Expand
Energy gaps in etched graphene nanoribbons.
- C. Stampfer, J. Güttinger, S. Hellmüller, F. Molitor, K. Ensslin, T. Ihn
- Materials Science, Medicine
- Physical review letters
- 5 November 2008
Transport measurements on an etched graphene nanoribbon are presented. It is shown that two distinct voltage scales can be experimentally extracted that characterize the parameter region of… Expand
Dipole coupling of a double quantum dot to a microwave resonator.
We demonstrate the realization of a hybrid solid-state quantum device, in which a semiconductor double quantum dot is dipole coupled to the microwave field of a superconducting coplanar waveguide… Expand
Electronic properties of nanostructures defined in Ga[Al]As heterostructures by local oxidation
Tunable nanostructures can be patterned in Ga[Al]As heterostructures with an atomic force microscope (AFM). Oxidizing the GaAs cap layer locally by applying a voltage to the AFM tip leads to… Expand
Quantum capacitance and density of states of graphene
We report on measurements of the quantum capacitance in graphene as a function of charge carrier density. A resonant LC-circuit giving high sensitivity to small capacitance changes is employed. The… Expand
Transport gap in side-gated graphene constrictions
We present measurements on side-gated graphene constrictions of different geometries. We characterize the transport gap by its width in back-gate voltage and compare this to an analysis based on… Expand
Localized charge carriers in graphene nanodevices
Graphene—two-dimensional carbon—is a material with unique mechanical, optical, chemical, and electronic properties. Its use in a wide range of applications was therefore suggested. From an electronic… Expand
Coherent spin–photon coupling using a resonant exchange qubit
Electron spins hold great promise for quantum computation because of their long coherence times. Long-distance coherent coupling of spins is a crucial step towards quantum information processing with… Expand
Tunable graphene single electron transistor.
- C. Stampfer, E. Schurtenberger, F. Molitor, J. Güttinger, T. Ihn, K. Ensslin
- Chemistry, Medicine
- Nano letters
- 9 June 2008
We report electronic transport experiments on a graphene single electron transistor. The device consists of a graphene island connected to source and drain electrodes via two narrow graphene… Expand
Raman imaging of doping domains in graphene on SiO2
We present spatially resolved Raman images of the G and 2D lines of single-layer graphene flakes. The spatial fluctuations of G and 2D lines are correlated and are thus shown to be affiliated with… Expand