Browsing by Subject "Graphene"

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  • Smirnov, D.; Schmidt, H.; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2012)
    Aharonov-Bohm oscillations are observed in a graphene quantum ring with a topgate covering one arm of the ring. As graphene is a gapless semiconductor, this geometry allows to study not only the quantum interference of ...
  • Slawig, Diana; Rizzi, Leo; Rothe, Tom; Schuster, Jörg; Tegenkamp, Christoph (Dordrecht [u.a.] : Springer Science + Business Media B.V, 2021)
    We analyzed nanographite-based materials in a combined study including experimental analysis via 4-point probe STM and simulation to provide a complete picture of microscopic and macroscopic properties of the material. The ...
  • Baringhaus, Jens; Stöhr, Alexander; Forti, Stiven; Starke, Ulrich; Tegenkamp, Christoph (London : Nature Publishing Group, 2015-04-21)
    The realization of ballistic graphene pn-junctions is an essential task in order to study Klein tunneling phenomena. Here we show that intercalation of Ge under the buffer layer of pre-structured SiC-samples succeeds to ...
  • Vattuone, L.; Smerieri, M.; Langer, Thomas; Tegenkamp, Christoph; Pfnür, Herbert; Silkin, V.M.; Chulkov, E.V.; Echenique, P.M.; Rocca, M. (College Park, MD : American Physical Society, 2013)
    The linear dispersion of the low-dimensional acoustic surface plasmon (ASP) opens perspectives in energy conversion, transport, and confinement far below optical frequencies. Although the ASP exists in a wide class of ...
  • Baringhaus, Jens; Settnes, Mikkel; Aprojanz, Johannes; Power, Stephen R.; Jauho, Antti-Pekka; Tegenkamp, Christoph (College Park, MD : American Physical Society, 2016)
    We realize nanometer size constrictions in ballistic graphene nanoribbons grown on sidewalls of SiC mesa structures. The high quality of our devices allows the observation of a number of electronic quantum interference ...
  • Smirnov, Dmitri (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2016)
    [no abstract]
  • Javvaji, Brahmanandam; Mortazavi, Bohayra; Rabczuk, Timon; Zhuang, Xiaoying (Cambridge : Royal Society of Chemistry, 2020)
    Recent experimental advances [Liu et al., npj 2D Mater. Appl., 2019, 3, 23] propose the design of graphene nanoribbon springs (GNRSs) to substantially enhance the stretchability of pristine graphene. A GNRS is a periodic ...
  • Hoppe, Bastian; Hindricks, Karen D.J.; Warwas, Dawid P.; Schulze, Hendrik A.; Mohmeyer, Alexander; Pinkvos, Tim J.; Zailskas, Saskia; Krey, Marc R.; Belke, Christopher; König, Sandra; Fröba, Michael; Haug, Rolf J.; Behrens, Peter (Cambridge : Royal Society of Chemistry, 2018)
    The metal-organic framework Cu-2,3,6,7,10,11-hexahydroxytriphenylene (Cu3hhtp2-MOF), a copper-based graphene-like framework, is one of the few MOFs featuring inherent electrical conductivity. Here, we investigate the ...
  • Pape, Florian; Poll, Gerhard (Basel : MDPI AG, 2020)
    In recent years, graphene-based lubrication was in the focus of nano-and microtribological studies. While the sliding properties of graphene based dry lubrication were previously investigated on the nano-and micro-scale, ...
  • Barthold, P.; Lüdtke, T.; Schmidt, H.; Haug, Rolf J. (Bristol : IOP Publishing Ltd., 2011)
    Hysteresis in the field effect of bilayer graphene is observed at a low temperature. We attribute this effect to charge traps in the substrate. When the sweep rate of the back-gate voltage is increased to higher values, ...
  • Schmidt, H.; Smirnov, D.; Rode, J.; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2013)
    An Atomic Force Microscope is used to alter one part of a single layer graphene sample locally. Transport experiments at low temperatures are then used to characterize the different parts independently with field effect ...
  • Müller, André (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2015)
    [no abstract]
  • Salman, M.; Gouider, F.; Friedemann, M.; Schmidt, H.; Ahlers, Franz-J.; Göthlich, M.; Haug, Rolf J.; Nachtwei, G. (College Park, MD : American Institute of Physics, 2013)
    The influence of a magnetic field on Landau levels (LLs) in graphene-based devices is described via the magneto-optical response induced by terahertz (THz) radiation. For single-layer graphene, the resonance energies of ...
  • Smirnov, D.; Schmidt, H.; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2013)
    Quantum interference is observed in a graphene ring system via the Aharonov Bohm effect. As graphene is a gapless semiconductor, this geometry allows to study the unique situation of quantum interference between electrons ...
  • Langer, Thomas; Förster, D.F.; Busse, C.; Michely, T.; Pfnür, Herbert; Tegenkamp, Christoph (Bristol : IOP Publishing Ltd., 2011)
    The sheet plasmon of graphene on Ir(111) was investigated in this paper by means of high-resolution electron energy loss spectroscopy. The perfect lateral coordination of sp2-hybridized C atoms on a large scale is manifested ...
  • Vasileva, G.Y.; Smirnov, D.; Vasilyev, Y.B.; Nestoklon, M.O.; Averkiev, N.S.; Novikov, S.; Kaya, I.I.; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2017)
    We have studied the electronic properties of epitaxial graphene devices patterned in a meander shape with the length up to a few centimeters and the width of few tens of microns. These samples show a pronounced dependence ...
  • Barthold, Patrick (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2011)
    [no abstract]
  • Smirnov, D.; Rode, J.C.; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2014)
    The influence of high magnetic fields on coherent transport is investigated. A monolayer graphene quantum ring is fabricated and the Aharonov-Bohm effect is observed. For increased magnitude of the magnetic field, higher ...
  • Gouider, Fathi; Salman, Majdi; Göthlich, Markus; Schmidt, Hennrik; Ahlers, Franz-J.; Haug, Rolf J.; Nachtwei, Georg (Bristol : Institute of Physics Publishing, 2013)
    In this study we present magnetotransport an magnetooptical data obtained in the magnetic field range 0T < B < 7T at detectors patterned in Corbino geometry on epitaxial graphene wafer using a Ge detector. We observed ...
  • Schmidt, H.; Lüdtke, T.; Barthold, P.; McCann, E.; Fal'Ko, V.I.; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2008)
    The use of two truly two-dimensional gapless semiconductors, monolayer and bilayer graphene, as current-carrying components in field-effect transistors (FETs) gives access to special types of nanoelectronic devices. Here, ...