Spatially resolved Raman spectroscopy of single- and few-layer graphene.
The D line intensity is investigated and no defects within the flake are found and a finite D line response originating from the edges can be attributed either to defects or to the breakdown of translational symmetry.
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…
Energy gaps in etched graphene nanoribbons.
- C. Stampfer, J. Güttinger, S. Hellmüller, F. Molitor, K. Ensslin, T. Ihn
- PhysicsPhysical Review Letters
- 5 November 2008
It is shown that two distinct voltage scales can be experimentally extracted that characterize the parameter region of suppressed conductance at low charge density in the ribbon.
Electronic properties of nanostructures defined in Ga[Al]As heterostructures by local oxidation
Strong Coupling Cavity QED with Gate-Defined Double Quantum Dots Enabled by a High Impedance Resonator
A system combining a quantum dot and a superconducting cavity achieves the strongest light-matter coupling for this type of hybrid system.
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…
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…
Tunable graphene single electron transistor.
- C. Stampfer, E. Schurtenberger, F. Molitor, J. Güttinger, T. Ihn, K. Ensslin
- PhysicsNano letters (Print)
- 9 June 2008
Electronic transport experiments on a graphene single electron transistor are reported, investigating energy scales for the tunneling gap, the resonances in the constrictions, and for the Coulomb blockade resonances.
Measurement of Rashba and Dresselhaus spin-orbit magnetic fields
Spin–orbit coupling is a manifestation of special relativity. In the reference frame of a moving electron, electric fields transform into magnetic fields, which interact with the electron spin and…
Irreversibility on the Level of Single-Electron Tunneling
We present a low-temperature experimental test of the fluctuation theorem for electron transport through a double quantum dot. The rare entropy-consuming system trajectories are detected in the form…