Understanding and engineering phonon-mediated tunneling into graphene on metal surfaces

Metal-intercalated graphene on Ir(111) exhibits phonon signatures in inelastic elec- tron tunneling spectroscopy with strengths that depend on the intercalant. Extraor- dinarily strong graphene phonon signals are observed for Cs intercalation. Li interca- lation likewise induces clearly discriminable phonon signatures, albeit less pronounced than observed for Cs. The signal can be finely tuned by the alkali metal coverage and gradually disappears upon increasing the junction conductance from tunneling to con- tact ranges. In contrast to Cs and Li, for Ni-intercalated graphene the phonon signals stay below the detection limit in all transport ranges. Going beyond the conventional two-terminal approach, transport calculations provide a comprehensive understanding of the subtle interplay between the graphene{electrode coupling and the observation of graphene phonon spectroscopic signatures

Speech Communication

Contains reports on two research projects.U. S. Air Force Cambridge Research Laboratories, Office of Aerospace Research, under Contract F19628-69-C-0044National Institutes of Health (Grant 2 RO1 NB-04332-06

Speech Communication

Contains reports on two research projects.U. S. Air Force (Electronic Systems Division) under Contract AF19(628)-5661National Institutes of Health (Grant 5 RO1 NB-04332-04)Lincoln Laboratory, a center for research operated by the Massachusetts Institute of Technology, with support of the U.S. Air Forc

Speech Communication

Contains research objectives and reports on two research objectives.U.S. Air Force (Air Force Cambridge Research Center, Air Research and Development Command) under Contract AF19(604)-6102National Science Foundatio

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Contains research objectives and reports on two research projects.National Institutes of Health (Grant MH-13390-01)U.S. Air Force (Electronic Systems Division) under Contract AF 19(628)-248

Speech Communication

Contains research objectives and reports on one research project.Air Force Cambridge Research Laboratories, Office of Aerospace Research, U.S. Air Force, under Contract AF19(628)-3325National Science Foundation (Grant GP-2495)National Institutes of Health (Grant NB-04332-02)National Institutes of Health (Grant MH-04737-04)National Aeronautics and Space Administration (Grant NsG-496

Speech Communication

Contains research objectives and reports on three research projects.U. S. Air Force (Electronic Systems Division) under Contract AF19(628)-5661National Institutes of Health (Grant 5 RO1 NB-04332-04

Speech Communication

Contains research objectives and reports on four research projects.U.S. Air Force (Electronic Systems Division) under Contract AF 19(628)-3325National Institutes of Health (Grant NB-04332-03

Speech Communication

Contains research objectives, summary of research and reports on one research project.U.S. Air Force Cambridge Research Laboratories, Office of Aerospace Research, under Contract F19628-69-C-0044National Institutes of Health (Grant 2 RO1 NB-04332-07