Scanning tunneling microscopy and spectroscopy of twisted trilayer graphene

Scanning tunneling spectroscopy of graphene on graphite.

We report low temperature high magnetic field scanning tunneling microscopy and spectroscopy of graphene flakes on graphite that exhibit the structural and electronic properties of graphene decoupled from the substrate. Pronounced peaks in the tunneling spectra develop with increasing field revealing a Landau level sequence that provides a direct way to identify graphene and to determine the de...

Scanning tunneling microscopy and spectroscopy investigations of QCA molecules.

Quantum-dot cellular automata (QCA), a computation paradigm based on the Coulomb interactions between neighboring cells. The key idea is to represent binary information, not by the state of a current switch (transistor), but rather by the configuration of charge in a bistable cell. In its molecular realization, the QCA cell can be a single molecule. QCA is ideally suited for molecular implement...

Scanning tunneling microscopy and spectroscopy of semi-insulating GaAs

N. D. Jäger, Ph. Ebert, K. Urban, R. Krause-Rehberg, and E. R. Weber Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany Fachbereich Physik, Martin-Luther-Universität Halle, 06099 Halle, Germany Department of Materials Science, University of California, and Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 ~Received ...

Recent advances in scanning tunneling microscopy and spectroscopy.

Scanning tunneling spectroscopy of epitaxial graphene nanoisland on Ir(111)

Scanning tunneling spectroscopy (STS) was used to measure local differential conductance (dI/dV) spectra on nanometer-size graphene islands on an Ir(111) surface. Energy resolved dI/dV maps clearly show a spatial modulation, which we ascribe to a modulated local density of states due to quantum confinement. STS near graphene edges indicates a position dependence of the dI/dV signals, which sugg...