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Showing 1–18 of 18 results
Advanced filters: Author: Heiko Sic Clear advanced filters

  • The realization of wafer-scale graphene electronics is envisaged to open up the route to the use of graphene in mainstream electronics. Hertelet al.take a step in this direction by fabricating a transistor with a SiC channel and graphene electrodes, with excellent performance up to megahertz frequencies.

    • S. Hertel
    • D. Waldmann
    • H.B. Weber
    ResearchOpen Access
    Nature Communications
    Volume: 3, P: 1-6

  • Thermal annealing of SiC produces graphene layers on an insulating substrate, but the material is highly inhomogeneous. It is now shown that an argon atmosphere during annealing improves uniformity of the graphene layers dramatically and yields better transport characteristics. This is a very important result for the development of graphene-based electronic devices.

    • Konstantin V. Emtsev
    • Aaron Bostwick
    • Thomas Seyller
    Research
    Nature Materials
    Volume: 8, P: 203-207

  • Silicon carbide is a wide-bandgap semiconductor with outstanding properties for efficient high-power electronic devices whose ultimate potential could not yet be exploited due to the presence of interface traps. The authors develop an experimentally less demanding analysis method that takes such defects into account when determining device parameters.

    • Martin Hauck
    • Johannes Lehmeyer
    • Michael Krieger
    ResearchOpen Access
    Communications Physics
    Volume: 2, P: 1-6

  • Femtosecond laser pulses are sent to a graphene/SiC interface to investigate photoinduced charge transfer from graphene to SiC. A charge transfer time of 300 attoseconds is obtained via laser-pulse-duration-dependent saturation fluence determination.

    • Christian Heide
    • Martin Hauck
    • Peter Hommelhoff
    Research
    Nature Photonics
    Volume: 14, P: 219-222

  • Bottom gates in epitaxial graphene structures can now be fabricated through a technique based on nitrogen implantation. This is an important achievement to increase both the versatility of the material for fundamental studies and the potential for its use in devices.

    • Daniel Waldmann
    • Johannes Jobst
    • Heiko B. Weber
    Research
    Nature Materials
    Volume: 10, P: 357-360

  • Contrary to common belief, bilayer graphene is not defect-free: the abundance of partial dislocations leads to a mosaic-like network structure. As a result, as now shown, the magnetoresistance of bilayer graphene depends linearly, rather than quadratically, on the external magnetic field.

    • Ferdinand Kisslinger
    • Christian Ott
    • Heiko B. Weber
    Research
    Nature Physics
    Volume: 11, P: 650-653

  • Light-field control of real and virtual charge carriers in a gold–graphene–gold heterostructure is demonstrated, and used to create a logic gate for application in lightwave electronics.

    • Tobias Boolakee
    • Christian Heide
    • Peter Hommelhoff
    Research
    Nature
    Volume: 605, P: 251-255

  • Basal-plane dislocations, identified as fundamental defects in bilayer graphene by transmission electron microscopy and atomistic simulations, reveal striking size effects, most notably a pronounced buckling of the graphene membrane, which drastically alters the strain state and is of key importance for the material’s mechanical and electronic properties.

    • Benjamin Butz
    • Christian Dolle
    • Erdmann Spiecker
    Research
    Nature
    Volume: 505, P: 533-537

  • Multi-proxy core data and model simulations support the presence of temperate rainforests near the South Pole during mid-Cretaceous warmth, indicating very high CO2 levels and the absence of Antarctic ice.

    • Johann P. Klages
    • Ulrich Salzmann
    • M. Scheinert
    Research
    Nature
    Volume: 580, P: 81-86

  • In seemingly indistinguishable bilayer graphene samples, two distinct transport regimes, insulating and metallic, have been identified experimentally. Here, the authors demonstrate that these two states originate from the interplay between extended defects and evanescent modes at the Dirac point.

    • Sam Shallcross
    • Sangeeta Sharma
    • Heiko B. Weber
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-8

  • Primary immunodeficiency disorders can be used to identify key immune functions. Here, the authors identify a biallelic mutation in the gene encoding NF-κB-inducing kinase in a family suffering a range of infections, and show that it causes defects in NK and T-cell function and has broad effects on B-cell function.

    • Katharina L. Willmann
    • Stefanie Klaver
    • Kaan Boztuğ
    ResearchOpen Access
    Nature Communications
    Volume: 5, P: 1-13

  • Light-field-driven control of electrons in a conductor is demonstrated by inducing a current by laser pulses in graphene that is sensitive to the carrier-envelope phase.

    • Takuya Higuchi
    • Christian Heide
    • Peter Hommelhoff
    Research
    Nature
    Volume: 550, P: 224-228